Nope, I doubt it... :/ Honestly I wouldn't try going against a keyboard+mice player with a 360 controller at all, it's a bad idea just sayin'. :?
i would probably play a lot better with a controller at the moment over my mouse and keyboard just because i am so used to it....
If you really want aim assist on, you can play the 360 version. Getting used to the keyboard and mouse is completely worth it imo.