We would have passed Xavier. The only tourney teams Xavier beat were Cincy, Butler (twice), Creighton (twice), Seton Hall (twice), and Providence (only 1 of 3). X lost both games to Nova. Besides Cincy, their other wins were against teams roughly equal to NC State or Va Tech. Duke by contrast beat UNCheat, MSU, Clemson, Miami, Florida, and Texas. The first 5 of those wins are better than Xavier's second best win. And we were talking about adding in another win over UNCheat for Duke to that (which sadly did not happen). Plus, Duke's wins against FSU, Va Tech, Notre Dame (twice), Syracuse, and Louisville basically equal Xavier's wins against the Big East's tourney bound teams. Bottom line - X hasn't really won anything compared to Duke.
I can't make this argument as things stand now. Xavier clearly deserves 1 seed over Duke with Duke's losses and our loss on Friday. But I think Duke would definitely have beaten them out for that last 1 seed with a win Friday.
But right, we'll never know.