is his exceptional defense while standing and punching. sherk has really good defense standing blocking punches and getting inside and flurrying with uppercuts and straight punches.
the guy hardly ever gets hit and when he does its not a hard enough shot to do anything to him.
no way does hermes land some garbage overhand on sherk.
I think Kenny Florian put up a good fight against Sherk.. everyone makes Sherk out to be this unstoppable force.. I believe that Sherk has good takedowns and amazing cardio/endurance but I don't think that this fight will be a walk in the park by any means..
He has real solid defense and his hands are always high, you can see him adjust after every exchange when standing. You are going to need a GSP type game plan to beat him and it is going to be hard for anyone at 155 to do that.