It should be noted that the new 'Data Centre' groupings are just a way of clumping servers into smaller groups on the character selection screen/lobby server - the actual physical data centres for the servers are still the same old ones in Japan and Canada (this is basically confirmed on the Lodestone in the 'Character Creation Restrictions' updates that SE regularly posts, which still list servers as under 'Japan Data Centre' and 'NA/EU Data Centre'). In any event, it definitely seems to be having an effect at least on cutting login queues, which is only a good thing.