I don't think there will be that many who will look at the option. Most 17-19 year old kids don't want to go to a foreign country. I think it's cooler once you're a bit older, but straight out of high school is rather scary. Plus, I don't think there's going to be many potentially NBA caliber high school kids that can't get minimum scores to get into a D-1 school. Heck, Jason Kidd couldn't even spell his own name out of high school and he got into Cal.
Jennings must be dumb as rocks. But, that probably won't prevent him from getting into Arizona. They'll figure something out.