Logistics. This was at Hartford and not Gampel.
For Hartford, would estimate less than 15% of the attendance lives in Hartford, CT. So that makes it a drivable game and of course people want to beat "the traffic".
Compare that to Gampel where students are flooding there and all walkable back to dorms or Ted's, Huskies, etc.
We should be thankful though we have a national brand in UConn, because other teams that have their games away from campus are having a hard time getting people to even go. Look at DePaul or Seton Hall...they play in the equivalent to the civic center (PBA whatever) and due to their teams being not so amazing, they get limited attendance.
Leaving early is the consequence of having good attendance. I'd take that any day over an empty arena.