Actually, in last night's game, the rebounding battle (including offensive rebounds) was quite close for 3.5 quarters, and only got lopsided near the end of the game. I had the ESPN detailed box score up throughout the game and I looked at it during every commercial, and for most of the game the Gamecocks led by only about 5 overall rebounds and 3 offensive rebounds. Since there are no "point in time" box scores available now, I can't document that, but it is what I observed during the game.
In the same way, Liv's and Boston's stats were quite comparable until late in the game, when Boston pulled away.