It's not like Tyree did agility testing either, although he does an excuse for it. Could your opinion of his agility be influenced by the quality of the tackles he was matched up against? Obviously he didn't play vs. Oklahoma and there weren't many decent tackles in that big 12 schedule last season beyond that. The remaining good matchups he had (Houston / NC State) were also two of his least impressive games.
week 2 vs. Houston: Wilson's size stands out more than his play does. He gets a few pressures but they are off blitzes, when a RB chips him, or beating the RT once. To be fair Wilson was getting double teamed a lot, but LT #76 Patrick Paul (6'7" 310lbs) held his own pretty well whenever Wilson tried to go outside.
week 3 vs. NC State: Anthony Belton (6'6" 330lbs) was more than agile enough to stay in front of him, although Wilson was a complete mismatch against his RT teammate McKay. The only pressure I saw on Belton's side was when he split a double team with power - something he is good at. He did catch Belton by surprise once or twice with a bull rush, but I came away more impressed by Belton than Wilson overall.