By major prospect, I assume you mean Iona, because that's where he's playing right now. I'm sure Glover is talented, but his 7.3 rebounds per game shouldn't have prevented a player with Thompson's size and athleticism from grabbing a few more boards.
If my basketball cred on ouhoops.com is irreparably damaged because I didn't follow the recruiting saga of a kid who committed to Seton Hall in 2007 over, well, no one, as that was his only offer, only to end up at Iona three years later, I guess it's a good thing I didn't also mention that Thompson was outrebounded the year before by a 6-3 guard.
Really, the fact is Thompson underperformed as a rebounder. You can spin it however you want, but even if he was asked to play out of position at the 3, he still should've had more than he did. Like I said, he's an intriguing prospect who obviously brings a lot of skill to the court, but I suspect he's going to be an occasionally frustrating player for OU fans due to production not quite meeting his perceived skill level.