Rebounding needs to be put in context of the rest of your team's strengths and weaknesses. If you shoot a high percentage, and create extra possessions with steals (or in our case blocks) then you can afford to be slightly out rebounded.
Our problem, so far, has been that were not good enough in the other areas of the game to make up for a rebounding deficiency. Rebounding alone won't kill us, but if we only play average defense, and are only average in offensive efficiency, then rebounding can be the final nail in the coffin.
But certainly Nova has shown, if you do the other things well you can live with being out rebounded.