Reason I say wait till holidays to judge is because this holiday we will see the launch performance (most significant portion) of some of the most important games to come on the Vita, as far as the West is concerned, that is:
Little Big Planet Vita, Assassin's Creed 3: Liberation, Playstation All-Stars Battle Royale, and Call of Duty:Black Ops Declassified.
These, apart from an eventual GTA, are some of the most crucial titles to come to the system. If they fail, it would pretty much be game over. So for now, let's wait and see.