I'd love to give a 250 a trackday workout. A rider from a local site posted his trackday vid from High Plains Raceway just outside of Denver, and the bigger bikes would BLOW by him on the straights..... and almost every corner he was right there passing them back. Those little bikes look like they'd be a blast.
I haven't heard much "hype" about them other than its a great platform to learn on.
Any twelve people who can't get themselves out of jury duty are not my peers.