Its fine, but its easy sportsmanship. Anyone can do that.
I mean, Nebraska did the same thing for Chad May in the 90s, but as soon as we beat them that changed. I know for a fact NU fans weren't staying around and applauding our effort after we destroyed them 2003.
And it usually happens in a case like this. OU hadn't won in Allen since in 1993. Really, its disguised as sportsmanship, but IMO its demeaning to the opponent because you are really saying "cute little effort from your guy, but we just beat you again".