By it's very nature, the mouse will always win. The reason console games have aim assist (the "sandpaper" kind not the lock on kind), is because a thumbstick just can't do what a mouse can and it can be pretty hard to use without any help.
Also, I'm feeling this implied idea (from the post) that PC gamers are simply better. That would depend on the the INDIVIDUAL, not what they play on. Seems like food just to start a flame war in the comments. They are different things with different gameplay (even in the same multiplatform game).
If they really took the "best" console players and made them play "mediocre" PC players, if it was a NEW game none of them had ever played, the PC gamers could win by advantage, but if they were playing, say, Halo 2, I still think the console players would win because they'd just know what to do better (teamwork, tactics, yada yada). Aim is not everything.
Meh, you get the idea and no, I'm not a console fanboy. I don't like this brand of news.