What's also true is that the PS Vita won't be released in every territory at the same time. Japan will be the first to get their hands on it, since it's Sony homeland. What's not been made clear is who will get it next. This is probably for the best, but with so many big titles coming out it's difficult to place a pre-order when a gamer doesn't know when the system is coming out in their region. Plus, this isn't a cheap purchase with the wifi-only version costing $249 and the 3G version set at $300.
One thing's for sure: as soon as Sony releases the Vita in Japan, they'll start talking about the release dates for the rest of the world. For now, the best thing to do is to save up at buy it on Day One. However, just like with Duke Nukem Forever, there's going to be a group of gamers who will place a pre-order and wait as long as they need to.