Turgeon has been OK, but not great, at MD. Turgeon's current deal had only another year or two; so, Maryland had to extend or move on to another coach, but surprised by the length and favorable terms, given that the MD fanbase was mixed about bringing him back at all. Maryland has generally failed at landing quality recruits from DC (he has done OK in Baltimore and Philly). The favorable terms indicate that Turgeon may have gotten interest from OK (or some other Power Conference school with an opening) which forced Maryland to up the ante.
Despise MD for leaving the ACC. Also, don't forget that when MD was good, their fanbase routinely became unnecessarily violent and destructive when they won; have attended games at almost every ACC venue, and generally if opposing fans were derisive, it was funny, with a hint of truth, which is welcomed. Maryland fans were just a-holes, stupid and unfunny. Classless group. Really hope that MD sucks in the next year or two, and MD is stuck with a contract that they can't get out of.
It’s been many years since I’ve experienced MD fans, but I remember them as pretty obnoxious. I would say the same thing about Louisville fans based on their behavior following the Orange Bowl.