They lost 6-0 to AAA school Loudoun Valley, Northwest Region Champion and State Semifinalist, but I think their goalkeeper had just rejoined the team after winning the Girls Division 2 basketball championship, so they might have been out of sync. They beat AAA school South Lakes 4-1 and AA School Potomac Falls 1-0. Potomac Falls lost to Broad Run 1-0 in the Dulles District playoffs.
I agree that George Mason would give any AA or A school a good game and could even hold it's own with many AAA schools. Not too bad for a school with 800 students (and that includes 8th grade).