I don't get the fuss over Robinson. He's very fast, but not as explosive as Taylor. His throwing is OK, but the only part of his throwing that is better than Taylor is his ability to put touch on short passes. Taylor wants to rifle everything in there, while Robinson has developed a little more patience and touch.
As far as Robinson's throwing though - 3 picks in the red zone against Michigan State. That was the first even semi-decent defense they played, and he and the UM offense could only manage 17 points. Robinson has been WAY over-hyped this season. You're going to see the Michigan offense continue to falter against teams like Iowa and Ohio State.
That said, I don't think Taylor has gone up against a semi-decent defense yet this year. Nobody in the PAC-10 plays defense, KSU's rush defense was 102nd in the country going into the game on Thursday, and the other 3 wins were all bad teams. We'll know how good Taylor (and our entire offense) really is after Saturday night.