Actually I have somewhat (referring to maniaclyrasist) back before they were uber on the site I came from.
 
 Anyways, I don't think the fact that Tyranitar can come in for a revenge-kill and Pursuit it signifies anything, as Metagross could come in on Deoxys-A and Pursuit it to death, but that didn't do a damn thing to its uber status. Latios 2HKOs with Grass Knot anyways, and HP Fighting just lols at anyone calling it a reliable counter.
I'm gonna mention here that a Careful TTar takes less than 50% from Specs Draco Meteor from Timid Latios, which is scary. Not gonna force anyone to use Careful Tar, though. Deoxys is very hard to switch into, and with the insane movepool, one that definitely beats the lati@s, makes its counters die. All but Spiritomb, who isn't very common. Metagross can be Fire Punched/HP Fired/Specs Thundered/or Sashcountered to death. On the other hand, Lati@s can't 2HKO TTar unboosted unless it uses Earthquake (or Specs Grass Knot/HP Fight), which TTar survives with ease and allows it to safely switch into a counter. On the Specs set, switch in Metagross or something and eat Latios for dinner. Oh and Blissey.
 
 I'd just like to point out that I have used them in standards. Like I said, the site I came from didn't immediately jump to the conclusion that Lati@s were uber, and for the majority of my time there I saw Latias pop up every other game. And I can safely say that it has very few safe switch-ins. Cresselia has a blast with repeated Draco Meteors, same with Snorlax and Regice, plus with Hippo on your team, none of those has any good recovery. I'd say Blissey is the best 100% counter against Specs versions, but DUH, we already figured that one out.
Garchomp has no reliable switch ins too (more specifically, CBChomp with Sandstream support). At least Specs Lati@s can be walled by Bliss
 
 Choice Scarf Weavile can revenge-kill Deoxys-A, Mewtwo, Darkrai, and Rayquaza, yet I don't see them dropping down to OU status. Also, I don't see great evidence of testing for the contrary, either. Plus you guys say that we haven't tested enough, well the only evidence of testing is one of Brawley's post, which was pretty much "Me and maniaclyrasist has a test Lati@s battle, we had a discussion and realized that if dies to Pursuit and we realized it's OK at best", which doesn't tell me a thing. Yes, you and Brawley had a few matches, and it failed one of you, so I can see how your opinion might be swayed. But I don't think that alone qualifies for an entire theory.
Well, if you rely too much on revenge killing, you won't get anywhere. Tar can switch into Lati@s, but Weavile dies in a single hit if he tries to switch in. And even if he does get a switch in, there are still stuff these things can do. Deoxys-A can Scarf or Countersash Weavile, Mewtwo will easily survive Night Slash and Aura Sphere, Darkrai will shrug off Brick Break and Dark Void Weavile to sleep. Oh and it can always switch out with Pursuit resistance. Rayquaza is the only thing revenge killed here, and it's power is absolutely insane. Plus, Ray might Extremespeed, which OHKOs Weavile after a Dragon Dance and Life orb I think. 
I see you guys saying we've been repeating ourselves, yet when I re-read the thread I see "Metagross comes in on anything except HP Fire and Pursuits", "Weavile can revenge-kill", "Since it doesn't have Fire Blast, steel-types wall it, and "Tyranitar has Pursuit! COUNTER!!". If what we've been spouting is theorymon, this is just RETARDED theorymon.