We knew it was too good to be true, eternal curmudgeonly pessimists that we are -- and sure enough, T-Mobile USA has put the kibosh on the start of its Android 1.5 rollout to G1 users. It seems that the build is still being "optimized" to "ensure optimal functionality and smooth delivery," which doesn't necessarily explain why T-Mobile UK users are already enjoying this stuff -- but then again, we're not the engineers and tech support folks that have to put up with the fallout from a failed launch. The carrier thinks everything will be delayed by about a week, which means that we're now looking at early June before everyone gets it.[Thanks to