Are there a healthy chunk of 17 year olds who grew up with an N64? Yep. I'll give you that point. Are there 8 year olds who are growing up with a Vectrex somewhere? Yep. But the largest percentage of 17 and under kids I've come across started with a PS2, XBox or Gamecube, and moved on to the next system. That bit you quoted was a mistake on my part, as I was thinking PS2 and Xbox, but typed up PS3 and 360 in a momentary brain fart which I didn't catch (but have now fixed). And yes, the Dreamcast was a part of that same generation, I just didn't list it... because... **sniffle** it didn't get as much love.
That said, keep in mind that the PS3 and Wii are over four years old, and the 360 is over five. These weren't just launched last year. So in truth, there is going to be a percentage of those 17 and under who began their gaming life with a 360, PS3 or Wii. It's not nearly as large as the chunk that started with those systems' predecessors, but they're there.
Anyway, rest assured, I'm quite in touch. I don't own the newest systems yet (can't afford them at the moment), but I have a PS2, Xbox and such. I've played and beaten the GTAs, the Halos, the Spyros and the Command & Conquers, along with the old Sonics, Marios, Dragon Warriors and Phantasy Stars, and had fun with them all. I've been through the vector graphics, digitized actor and the "Why is everything brown?" crazes. I'm not pulling these statements out of my ass as I go along, I'm stating them based on years of experiences and conversations. Yes, there are 2010 kids who will grow up being introduced to the NES, the Genesis, the PS1, and even the 2600, and they'll have a damn good time hopefully. But the sad truth is that there are a lot more kids who will blow off those older systems when given the chance to play them, simply because the systems are outdated. Maybe it's because of the dated visuals, the lower quality music, or whatever, but the games of old seem to get ignored for all the wrong reasons by the younger game players. And while I know there are older gamer's who do the same kind of thing to newer games, to be honest, everything I've seen points to there being more young gamers unwilling to try older games, than older gamers unwilling to try newer games.
Again, this is based on everything I've experienced over the years. Maybe I'm wrong and my experiences are some odd little microcosm of gaming. But frankly, I've been given little reason to think so at this point.