I actually think that Orton is a decent QB. I also think that Trent is one as well. The difference (in my view) is the following:
In 2009, the Denver offensive line gave up 34 sacks and 62 QB hits.
In 2009, the Bills offensive line gave up 46 sacks and 103 QB hits.
In 2008, the Bears offensive line gave up 29 sacks.
In 2008, the Bills offensive line gave up 38 sacks.