No, I was talking about O-line. I mostly forgot that Peters played ST's for the 5 games in which he appeared in his rookie (2004) season, and until he became the full-time starting RT in the 8th game of his 2nd season (although he made a start in the 6th game, for the ailing Mike Williams). The blocked punt for a TD in 2004 was impressive, but didn't affect the outcome of the game (the Bills beat the Bungles 33-17). As for "having a part in the success of the team" in those 5 games in 2004, I don't recall the ST's winning any of those games for the Bills, and the Bills have had stellar ST's during the 5 years April has been around, and even after Peters stopped playing them. Essentially he was another piece in the puzzle for April, but yes, technically he was more productive than Bell was in his rookie season.
And the point with "playing LT 1-1/2 years earlier than Peters" is that they trust Bell to play LT sooner than they did Peters. Time spent at the position in college and "rate of development in the NFL" is meaningless, although Peters was a blocking TE in college, and was essentially another O-lineman. And Peters played at a better school with better coaches than Bell.
Look, I know you "don't really care about Peters" , but you've somehow managed to deify the guy for 12 games of ST's play and 1-1/2 years of playing OT well. I think it's safe to say that there are serious concerns that he won't ever re-achieve, much less consistently sustain, what he showed in 2007, his first and only deserved Pro Bowl season, and those concerns don't even take into account the $10M/year he's now getting. His behavior during the 2008 off-season was unprofessional and inexcusable, although some (ahem) have tried. Otherwise he'd still be here.