I would take Norvell over Davis anyway. Sorry but the GD experiment is over. The guy's only real success at Texas was with Vince Young, Rickey Williams, and other NFL talent at the skill positions.
Sorry but Iowa does not have that, he has not brought his "texas" pipeline to Iowa, so I say after this year cut ties with him. He has not shown any improvement over Kenny OKeefe. The 3yd slant/out route is not getting it done. Also we do not have a "spread type" QB on our roster. I love the 3rd & 4 spread formation. Sorry but that ain't gonna work and we are not a zone read team.