He won a DII national championship; he put UMW in the sweet 16; he resurrected a floundering UT program, winning the SEC, putting them in the NCAA tourney 3 (and counting times,) achieved (briefly) a #1 ranking, and created some national prominence for the program. He is the second fastest coach to 300 wins, and he has a losing record in the conference only to Kentucky (3-4 after last night.)
Those are some pretty nice accomplishments. Sustaining that level of success is difficult, but I believe with what he has done thusfar, he can do it. I do not know if he can make the leap from a guy who can put up a nice regular season record and win a couple of tourney games to a legit final four contender.
And, judging mainly by the list of more accomplished college coaches that have failed in the NBA, I don't see much to indicate why he would be successful as a pro coach where so many others have failed, in a game where recruiting doesn't exist, seasons and games are hellishly long, and managing egos is as important as player development. Running a pro team requires different skills than building a college program.