Rebounding doesn't mean much ?
Who says so ?
Haven't the lineups been rebounding better with Davis on the floor than Shelden Williams?
Seems to me that the difference between the two on the glass isn't that large. Williams is better at grabbing the loose ball while Davis bothers to box people out.
Williams isn't as good a rebounder as his individual rebounding numbers suggest and BBD is a better rebounder than his numbers suggest.