I agree it would be nice if they updated early. Yesterday we went into T-mobile Hungary due to my wife's x10 mini pro suffering from extreme lag, and they refreshed the software on it, but the guy said it will be a slightly different version. That peaked my curiosity, then he said it's still 1.6 just a newer build than what was shipped with the phones. He also mentioned that 2.x is coming before Christmas, but they expect it near the end of October.
So just a tip, if anyone is experiencing lag, and is under warranty, consider asking for a refresh on the phone. Wife said she noticed one or two minor changes, but mainly its a lot quicker than before.