Um.. what are you guys talking about? "He didn't defeat them"? He didnt even TRY to. He didnt fire a single bullet, he didn't use his swords. He was putting up a show, trying to make THEM look "GOOD" for the camera and the only one who figured it out was Logan, the others were trying to take him down. He could've killed Cyclops, and im pretty sure Domino and Surge would've been hit too if he used his guns. Colossus is a different story, noone says that DP koed him with that kick, just knocked him off the roof when Piotr didnt see it coming, what's wrong with that? Piotr is no Blob, he can be moved, especially if he doesnt see it coming, even if he weights a ton, that doesnt change anything.
As for that Spider-man "fight" Deadpool was holding back, wasnt using guns or even swords, he didnt want that fight at all, said that himself. There was another fight in one of the recent "amazing spider-man" Deadpool used his swords, he couldnt cut Parker but didnt get hit either. In the end it turned out (as it always is with DP) the whole fight was a set up. DP promised Spider-man to kick his butt in Deadpool #19.
Also if anyone's interested there's a Deadpool 19 preview in the net, Deadpool is trying to convince Spider-man to take him as his sidekick while Spider-man's hitting him non-stop for like three pages, Deadpool is just standing there and taking the hits. Took Parker like 20 punches and kicks in the face to make Deadpool dizzy.