I've seen them play several times on TV and yeah...they look great! But this is such an atypical move for pollsters. This really meant that Mizzou made a pretty big jump over both UConn and Xavier. UConn beat #24 Harvard. Xavier beat Butler and Cincinnati. Mizzou beat Villanova and Navy. If you ask me - these schools are all comparable with the exception of UConn having the toughest opponent by far.
I think Mizzou does deserve a top 10 ranking. They're a great team. I think Xavier is even better. I think they have played very very well in tough situations. And in some respects, I don't think UConn is as good as either of these teams yet but certainly has the capacity to be #1 eventually.
It just was a very odd move in my opinion. Losing a spot after beating a ranked team (and not losing another game) is probably a move in the polls very infrequently observed.