Both Massey and Sagarin had ND rated #2 behind UConn prior to last night, so they did at least seem to deserve their #3 ranking at that point. Today the Irish are #3 behind USCar in both ratings, and just .01 in both indexes ahead of Baylor, so that will likely lead to further changes.
Fact is, they have played 6 games against top 50 teams, while USCar has only played 2 and Baylor 3, so they definitely have the SOS on their side. And yes I know that talking about top 50 teams is stretching things too far since top teams should only be concerned with the top maybe 20, but Stanford is at #26 (Massey) and #33 (Sagarin), so the worry point can extend further out.
Also, for those worried about UConn's future SOS, in Massey the Huskies are currently rated with the #1 SOS and are projected to finish at #5, so not too bad.