Quinn was a good executioner of short to intermediate passing plays when protected. He really was. He hit receivers in stride beautifully (especially RBs) but (always a but), he couldn't function off script and that's what we needed a couple of times last year and that's what NFL scouts saw.
However, that does NOT necessarily mean what Spurrier seems to be implying (that Arch isn't as good as Quinn or else he would have started).
At the beginning of the season, Quinn was the best QB on the team. He was absolutely fantastic vs. Michigan. He did nothing to lose his job from that point on. I think he was more hampered by injuries this season than we know but his play was good enough. There was never a reason to pull Quinn and risk QB growing pains mid season. There was too much on the line to play with fire like that.
Spurrier is probably just pissed that the Longhorns are in the SEC, having success, and expanding their recruiting footprint all over the south east. For years, the SEC pooped on the Longhorns as an inferior team from an inferior conference. I think what is happening with the Longhorns scares them and little Stevie doesn't like it.
The SEC expected Aggie Part 2.........but that's what they got. The team mocked for "being back" actually came back right in the face of the mighty SEC.
Hook Em