Last year was pretty surprising for us I'd say, but maybe not like UConn this year.
As far as 2011, I believe UConn was a 3 or 4 seed right? That team went 25-0 or so out of conference and 9-9 in the Big East. I wouldn't call them a "good" team, but for some reason they dominated OOC that whole year, and obviously Kemba.
Sometimes it's just matchups man. 2010 and 2012 we probalby go to the Final Four if we were at full strength; 2011 we kinda got screwed on that over and back call (but we probably lose to UNC the next round); 2009 we ran into that absolute buzzsaw in Blake Griffin and OU, that was after being James Harden in the round of 32.
Coincidentally, our easiest road in the tournament in a LONG time was this year, with arguably our worst team in the last 5 years. The '13, '12, '11, '10, '09 all make it to at least the Elite 8 with this road; funny how things work out sometimes.
I get that titles mean everything, and I get how exciting March Madness is, but how many times does the best team win? In the NBA, NHL, MLB, you have to win multiple times against the same time to advance. In college basketball all it takes to win is for you to play decent and the other team to shoot horribly. Florida could go 2/15 from 3 tonight and Dayton could win 60-55 and go to the Final Four; it doesn't mean that Dayton is a better team, it just means Florida was bad for one night and Dayton happened to catch them. I've always said (and got killed) that it's a bad way to decide a champion. It makes November-February almost completely irrelevant.