think part of what makes Deion's time hard to compare is that the B12 has dissolved (so you're missing OK and TX, the best 2 teams by far in terms of track record)
Wins this year are Wyoming, Delaware, and a now 5-4 ISU
Last year its NDSU, Colorado State (who just fired its coach for being so bad), 8-5 Baylor, 4-8 UCF, 4-8 AZ, 5-7 Cinci, 8-5 TTU, 5-7 Utah, and 3-9 Ok St with the Heisman winner and an NFL QB plus whole bunch of WRs
The year prior its 5-7 TCU, 5-7 Nebby, 5-7 CSU, and 3-9 ASU
So he's beaten 3 teams with winning records in 3 years (4 if you count NDSU and we'll see where ISU finishes).
He brought them a lot of publicity and the boost in applications to the school will be nice (esp if it makes alumni that donate), but I don't think he's really made much headway in making lifelong fans as right now its a bunch of celebrity following who is going to go back to not caring after he's gone