I think so, plus the more often you do it the more use to each other you will get and the more you'll know of each other's bodies. If you guys have open communication about it, he can always improve. Also, for me, being emotionally close/attached to someone makes the sex that much better, so he would already have an advantage is that area.
I'm fortunate the guy I'm with is the best I've had. But yeah, sometimes guys rock your world and leave all the rest as second best. It's normal. If I break up with my guy, I will always remember him as the best. Unless the next one is better :)