One reason I think Colts fans were more forgiving was Peyton first practice was in the pre-game of the 1st game. Because of the infection and surgeries, Peyton missed all of training came and all of the preseason. So much of the Colts offense relies on timing and precision, that not making a single throw prior to game one was a HUGE issue. If you look at when Peyton's numbers started to straighten out, it matches up time wise to the amount of time training camp and preseason would have taken. I think most Colts fans were hold out hope that once he got some practice time under his belt, things would start clicking.