Plain and simple Thomas is overrated. He has one of the highest drop percentages and seems to be targeted often for offensive pass interference. His speed reminds me more of a TE than an explosive receiver. Comparing Sanders and Thomas as far as toughness and effort, I personally see strong interest and pride in Sanders to perform at a high level. Not so much with Thomas.  Blame the QB to some extent, but great receivers find ways to make their QB look good. Thomas has disappeared in many games even when Manning was here.