In the NFL a redshirt season seems to last about 11 or 12 games. The Patriots redshirted Vince Wilfork the same way.
What Wright needed was to harden his cookie dough body into NFL shape. Considering where he was, you just can't do that in one preseason or training camp. And, during the season if you're playing, you're really working too hard and undergoing too much stress to have any chance at molding your body the way you want. He spent all this time basically inactive so he could get into NFL shape, and he seems to have done it. Him being dominant should not be considered the "surprise". The surprise is that the coaching staff somehow managaed to motivate him into working hard and getting in shape. The surprise has already passed. Now what you have is the player everyone knew Manny could be if you ever got him to stop being a "turd" and get into shape, work hard, etc.
If he truly only got about 5-10 snaps, then quite frankly it is amazing that in those 5-10 snaps he was able to amass 1 sack, 2 hurries, and a pass defensed. At this point, you can start unleashing expectations that the guy will be a good starting DT in this league. He's got a lot further to go, but it is safe to say that he has already passed the impetus that dropped him from the 2nd round to the 5th round in the supplemental draft.