I can't see any reason to think he's faking.

First, he's a better fighter, but that's just my opinion, but still I doubt he'd back out on a fight he'd win.

But even more so, he wasn't forced to take this fight. It wasn't a deal where he'd been called out by the guy for a long time and felt like he was forced to take it because of public pressure. There was actually no real reason for him to take it, so why take it then back out, just doesn't make sense.

The only thing is that MAYBE he didn't really know much about Katsidis before, then watched some film and just decided he was too much for him. But I don't buy that, Guzman's a very confident guy, at least he appears to be, and I could be wrong, but I don't see Katsidis as some kind of monster.