He did beat Cann which everyone expected him to because it was a favorable match up for him.
This is Bispings curse, he was going to get KO'd, smoked and laid out according to many, Stann was legit etc...
Then Bisping beats him and it's "lol Brian Cann".
Bisping v Mayhem, well they both looked like shit due to the short training camp, doing TUF for months with little training, the usually lean Mike looked chubby going into that fight.
I still agree with you that Vitor will win, I just don't think it will be a devastation, more like a flash TKO that Bisping walks away from after it's stopped.