Not sure how it spellchecked my 'probably' to 'pregnant' but I guess that's what I get for writing while driving. Anyways, you'll be happy if you liked the 9s, the 10s felt a little stiff and higher off the ground. These felt lower and the flyknit isn't as hard.
I think its going to be fine, it's just anytime they try a new traction pattern I get nervous. The rubber compound seemed to be more like the Xs, so outdoor use is pregnant a no go.