Class size matters for sure. I think you can sort by average rating, which is also important.
UW is 5th right now, even though the last few players they took have lower ratings (which will change as they develop through their senior seasons - diamonds in the rough that UW lives on). They have 16 commits right now.
Minnesota is 8th right now, with 24 commits. Very low player ratings. Iowa is 4th, with 22 commits. Also lower ratings. UNL is 11th, with only 10 commits. But they have the highest player rating in the West, right now, and are favorites for a number of higher-rated kids that Iowa, Minnie and UW all want.