I actually figured that might be the case after I thought about it, and I guess I didn't catch that it was E-ATX when I read the review. Oh well -- the P190's certainly a worthy alternative.
Don't let get me started on the P190. Let me put it this way, none of the power supplies Intel recommends will fit the P190. The two PSUs it comes with are horribly balanced and wouldn't be a good fit to run Skulltrail. That's just my opinion though.