Yeah, AKo is behind, even w/ 9s that don't see your suit, but it's like 55/45 which most call a coinflip:

http://twodimes.net/h/?z=21259
pokenum -h ad kh - 9s 9c
Holdem Hi: 1712304 enumerated boards
cards win %win lose %lose tie %tie EV
Ad Kh 756208 44.16 950774 55.53 5322 0.31 0.443
9s 9c 950774 55.53 756208 44.16 5322 0.31 0.557

Good thing about 9s and 10s is that even if a J or Q comes, you still got some 'wiggle room' for a move. Maybe.