Well, if we're going to go back "several decades," I'd direct you to Dayton's Final Four appearance, national championship runner-up status and the fact that UD has occupied every spot in the AP poll from Nos. 2-25. Despite all of xavier's success, it still has never achieved what the Flyers have.
Now, if we want to stick to recent history that's fine too. UD has won two of the last three meetings between the two schools and fell in OT on the road in the most recent game, despite the fact that this year's team has essentially been kept together with duct tape and bailing wire. I'm extremely happy with the way the program is trending now under Archie Miller. With the recruits/transfers coming in for next year (one from Georgetown, one from LSU, and two recruits originally committed to St. John's and West Virginia), I'm fine with whichever way this transitional season plays out.