Centralization was due to the nature of the suspect test. People are going to prepare to deal with the suspect, not entirely sure of what they'll face. They'll also try to use and abuse the suspect, praying on people's lack of knowledge (which didn't work too well).
How she stands next to the uber criteria. Definitions are assumed known.
Offense: From every battle I've witnessed involving her, Latias does not fit this uber characteristic. Generally speaking she is just another special attacker like any other non-uber of that category. Anything with decent Special bulk (such as Tyranitar or Blissey) can withstand her assaults with ease. She won't be sweeping large portions of teams with little effort anytime this generation.
Defense: Latias cannot wall any better than the special wall of OU. There are many common attackers that can come in and take her down without much struggle. She is mauled by most any unresisted physical attacks, while special attacks can break her relatively well if she doesn't invest for it (even Blissey needs some Special Defense investment). There is no special trait that makes her a significantly better wall than others (namely Blissey, the special wall every other special wall has to compete with for a team slot).
Support: Similar to the defensive characteristic, there isn't a lot that sets Latias apart for this role. Every part she can play (dual screen, status, wish support, etc) can be done by other available Pokémon without any drawbacks of picking them rather than her. She doesn't simply 'outclass' others that attempt the same thing.
In a nutshell, she doesn't stand out and above (which is what the uber criteria is looking for in a way); she blends in with others of whatever role she plays. She has to compete for a team spot just like anything else, rather than simply getting the spot by being the best at whatever role is needed. A player can choose to use a Pokémon other than Latias for a role she fits and not suffer any guaranteed consequences. This is what criteria I used to vote on.
And I'll throw it out there one more time; if OU does start to centralize, how is it Latias' fault?
EDIT: reachzero had a good idea. Copy-paste :P
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Last edited by Veedrock; Jan 31st, 2009 at 1:59:42 PM.