I think that's what makes trying to compare stats when results are posted so hard, it's difficult to compare with just the basic resume stats, the outliers as you mentioned always make some shake their heads on why they were not offered on that particular board. My younger son received an scholarship on the first board to his four top schools, his GPA was 3.5 u/w and a 24 ACT, to look at just those two stats it would really make people wonder why, The PMS he interviewed with told him it was the strength of the rest of his application that made the difference. Just to be transparent, his application was made in the fall of 2010.
The main point is to control what you can control, don't worry about the stats of others and remember that the vast majority of scholarships are awarded on the second and third boards.