In Weber, 25% of my rebounds go to guards in motion-man. 17% go to SF. 58% went to my bigs.
That being said, the rebound ratings for my guards (the majority of the year) are 77, 37, 31 and 16. That's how I recruit now a days at DI.
Postscript:
Last night, in a second round game, my guards got 33% of my rebounds en route to a 13 point win. My SFs got 26%.