It's funny how camaraderie can evaporate the minute someone feels one of their number doesn't deserve to win. On this week's episode of Top Chef: Las Vegas ("Penn and Teller"), the chefs seemed to offer a unified front, even going so far as to honor the memory of their fallen compere Mattin by donning his trademark red scarves (just how many did he pack?) in the Top Chef kitchen. It was a touching testament to how much of an emotional impact Mattin had on the chefs (even if not in a culinary sense) but that sense of community was quickly shattered by the results of the Quickfire Challenge this week. Now I've long felt that there have been several chefs still in the competition at this point who should have packed their knives a long time ago. Perhaps it's the fact that there seem to be four incredibly talented chefs gunning for the final four (that would be Kevin, Jennifer, and the Voltaggio brothers) but the majority of the other contestants haven't