Samsung said there will be a "Global" launch, meaning that they don't want to repeat the fiasco of last year with the GS2 again, at least that's how I interpret it. The fact that they said they will have the US tour in June tells you that the phones should be close to ready and for all we know, the US Carrier versions are part of the 9 million pre ordered phones. Why don't they release the specs and looks for the US versions yet? Well, I am guessing they want to continue their secrecy and hype with the US tour. Why they are supposedly going to 10 cities for that (read that somewhere) is not entirely clear. Anyways, they know from last year that they need to strike the iron while it's hot. The One X and Evo 4G LTE are strong competitors, unlike the lacklaster competition the GS2 had to face, so it's not going to be an easy cake walk this year around where they can afford to lollygag and wait around for 4 months until finally releasing it in the fall.
Hope I am right, can't wait to get this phone!