Completely unexpected and out of the dark.
Living in Pittsburgh and having a wife that works at Pitt's Medical Center (thus she gets perks of season tickets for free) I've been subject to Pitt games this season and here's what I can tell you about Graham.
Pros:
He CAN run a pretty nice offense when the pieces are in place. I don't think it will take him long to have some success in Tempe. While Pitt's offense sputtered, putting a high octane offense out there with Tino Sunseri as your only viable QB is the proveribal square peg/round hole scenario. Also, I can't help but think a healthy Ray Graham and Dion Lewis returning would have made his offensive hopes substantially better.
He generally runs a disciplined team, which doesn't make many blockheaded penalties or errors.
Can recruit in Texas, Oklahoma and landed a few Californians.
Cons:
He's EXTREMELY stubborn with his ways. There's no budging with him, he's either going to run his high octane plans or go down in flames. When Graham went down, there was zero adaptation.
He threw Sunseri under the bus.... OFTEN. He seems to be one who instead of taking accountability for losses, will shift blame to the players.
Him calling ANYONE of his staff "mercenaries" is the paint labeling the kettle. This is a guy who has gone one-and-done at TWO jobs now (he also ditched Rice after one year for Tulsa) and don't think for one second if a more high profile job opens and he's doing respectably, he'll stick around. He'll bolt from Tempe as quick as he's bolting from Pittsburgh.
Recruiting wise, he's extremely one dimensional. Little emphasis on defense, even though he started his coaching career as a defensive coordinator.
For the question of him being like Wanny, he's not.. Not even close, neither good nor bad.
I'm truly not nuts about the hire, because some of his cons are alarming, especially his stubbornness. Fact that he'd rather get beat 56-3 than adapt his game plan is frightening at best. The fact that he'll have his UHaul packed and will be heading up I10 for a more high profile job before anyone knows he's gone is also alarming. To tell his team he's quitting via text is as low as it gets, as is verbally agreeing to a contract extension with the team that one year earlier gave you your HC break, only to accept a job with another school 20 minutes later is dirty.
I don't like it.. I really don't.