I agree, in that Gameloft is just taking the easy route with these ports, and refuses to take Windows Phone as a serious customer. I was really looking forward to the games being more optimized compared to their Android counterparts since there is only one SOC to develop against....
Asphalt 7 looks and plays as if the game is a recording or something...a recording that you can manipulate and play (if that makes sense). It isn't "crisp" and clear looking and has a type of cloudy look, with a framerate that isn't slow, but isn't as smooth as iOS either...
Spiderman, as mentioned, runs terrible. It really shows you that Gameloft doesn't care, because there is no way that that would've passed testing running that slow...