Every year when the XL/Gampel split is announced, one of the first things I do is run the schedule against preseason projections and it usually comes out close to even, alternating a small advantage to either venue in a given year.
This is how it matches up this year (using Bart Torvik's preseason projections):
Gampel
Sacred Heart -- 349
Texas A&M-Commerce -- 355
Baylor -- 14
Providence -- 49
Creighton -- 13
St. John’s -- 15
Marquette -- 25
Seton Hall -- 92
XL
New Hampshire -- 324
Le Moyne -- 315
Maryland ES -- 362
Xavier -- 37
Butler -- 76
DePaul -- 119
Villanova -- 43
Georgetown -- 106
The average Torvik rank of all games: 114 Gampel, 153 at XL.
The average of the top 6 games (removing the 2 worst cupcakes at each) 35 Gampel, 116 XL
The average of the 5 best games: 23 Gampel, 74.5 XL