I agree 100%. Take a cannon arm without the cerebral traits and you get a bust in Jamarcus Russell. On the other hand Fitzpatrick had made a decent journeyman career out of his brain talent but not much arm talent. Then you have guys like Rodgers who are the complete package.
Arm strength isn't everything, but it's a complementing factor to make an elite quarterback. Arm strength is useless without the brain stuff (if you consider making millions of dollars and being a crappy quarterback "useless"). Odds are more against Peterman becoming elite due to his arm strength (which is why he fell in the draft), but his ceiling is much higher than many give him credit for (long term backup?). I guess we'll just have to wait and see. Get your popcorn ready for this Sunday!!