For all of those who seem to think that Sam doesn't or can't make that throw on the crossing route to Austin..... Consider this for just a minute.
Indy played man coverage exclusively throughout the game. Based on the Rams recent tendency and success in the running game with Stacy, they obviously sold out to strop the run. They chose to put the game in the hands of Clemens and the young receiving core as they more than likely felt he wasn't capable of making enough plays to beat them.
Again, as much of this thread is speculative, who's to say had Bradford been the QB, would Indy have taken this approach? My guess, Indianapolis (based on what virtually every other opponent had done while Bradford was playing) would have been to play much more zone coverage. Those crossing routes just aren't as effective against zone coverage, and therefore, that entire play doesn't happen at all.
So rather than just picking selective plays and saying Clemens executed "better", how about putting the entire game in perspective and see the differences in how teams approach THIS Rams offense, as opposed to the one that Bradford was at the helm of for the first 6 weeks of the season.