Deoxys-Speed
Uber? Yes.
The Deoxys-Speed being uber argument isn't about individual pokemon becoming less viable, its about team combinations becoming essentially unusable. The statistics only show how much an individual pokemon is used, not how it is actually used in the context of the team. Pokemon is a team game, so individual stats just aren't as significant in every situation. The method that "definitely works to detect centralization" ignores this. Sure, the usages of most OU pokemon have been steady, but this is a sign of the individual pokemon being good enough to use
on its own. As ipl has described, and I have experienced as well, Deoxys-Speed is killer to offensive teams. Deoxys-Speed doesn't hurt the usage of individual pokemon, it hurts certain combinations of those pokemon by preventing them from being effective together and that in turn centralizes the game by removing potential usable strategies.
Sweeper teams, which were immensely popular and effective at the start of D/P, are basically unusable now with the advent of Deoxys-Speed . Also, D-S has essentially eliminated the Choice Scarf from having an impact, as ipl said. The game has turned into "bulky offense", as people like myself and (especially) ipl predicted, because any other kind of strategy is rendered unusable by Deoxys-Speed.
Deoxys-S is not too much of a problem in OU. There have been so few people that have complained about it, that it seems like it's almost forgotten. The problem with it is that, while it is a good pokemon, and a serious threat, if it gets paralyzed at all, it becomes dead weight on its team.
If it's hit with a crippling status effect, yeah of course it isn't going to be as good.
For instance, a simple Thunder Wave makes its entire purpose on the team - a fast revenge-killer, or a cosmic power abuser, completely useless. Its defenses are okay, but unless they're boosted by Cosmic Power, it can't take hits from the hard-hitters of OU very well. When it's paralyzed, it's forced to take hits from the slower but powerful sweepers such as Metagross, effectively screwing it over. Most teams carry something that can paralyze, meaning that it has to be careful when switching in. Now, I do realize that this goes for a lot of fast frail sweepers, but unfortunately, Deoxys-S's offenses really do not make up for this like they do for other sweepers, since they're not all that deadly.
If it's hit with a crippling status effect, yeah of course it isn't going to be as good.
It doesn't really seem to me that offensive teams have that bad of a time with Deoxys-S. Since most offensive teams play to their resistances, they can just keep switching to make Deoxys-S die from LO recoil, of course, a Rapid Spinner is probably important on offensive teams anyway. If the Cosmic Wall is giving the offensive teams problems, a lot of set-up sweepers enjoy using Taunt, and when CP Deoxys-S rarely carries an attacking move, it's unless it switches.
Offensive teams play to resistances, you are right. But the last part of what you said means that I have to guess correctly 10 times in a row, and even then that is assuming that you are using a Life Orb. Rapid Spinning is not important to offensive teams because the general idea is to not let entry hazards get set up.
Deoxys-Speed
KILLS offensive teams. I really can't believe you posted this. How can you expect a team that relies on resistances to beat something that hits almost everything for super effective damage?
Ok, well I don't mean to detract from discussion of this thing, but can't Yanmega do that as well as long as Blissey's gone? All Yanmega needs to do is Protect and it's basically faster than everything in the game, and can take most things, besides Blissey and Snorlax from 50% to 0% in one shot with Bug Buzz/Air Slash/HP Ground with a Life Orb or Wise Glasses. Sorry, but I just don't really think it's unique to Deoxys-S, and thus, being a late-game cleaner shouldn't be the only reason for Deoxys-S to be banned from OU in my opinion. The Cosmic Power thing isn't even close to uber.
Except doing that requires a moveslot for Protect, the inferior Speed Boost ability, is walled by any Flying-type, is 4x weak to stealth rock, and after one protect is still not faster than Choice Scarfers. Oh yeah, and it still can't touch Blissey and Snorlax without some serious team support. Being an effective late-game sweeper is not unique to D-S, but being the best sweeper is.
And as offensively speaking, Deoxys-E can only really pick off pokemon 2x or 4x weak to one of its moves. Bulky Steels generally have their way with Doexys-E not to mention its crippling fear of Pursuit or Priority moves. It is evidenced from usage statistics that Deoxys-E isn't as threatening as first thought, being the 37th most used pokemon in May 08' (Weighted usage).
There are quite a few pokemon with 4x and 2x weaknesses that Deoxys-Speed outspeeds and OHKOs 100% of the time. I would go through a list but this post is long enough already. I've already addressed why the usage statistics are meaningless at the top of this post.
Deoxys-S hits hard, but no harder than Infernape.
Boltbeam+Superpower is much more effective than CC+Fire Move+Ice or Grass move, and Infernape does not have the advantage of being faster than all of its counters.
When you are using a certain type of team, there is of course that one weakness.
Except that weaknesses to certain pokemon can be adapted to by simply switching a pokemon or a moveset around here or there. Deoxys-Speed requires you to change the entire mindset of your team or else you are getting swept without even touching it. Using resistances isn't enough anymore, you have to rely on sheer defensive stats to take its attacks. Offensive teams can not do this because pokemon with high attack and speed stats rarely have good defensive stats.