After three quarters, the road team was 30-59, with 10 offensive boards and 39 total rebounds, while the home team was 18-60 with 10 offensive boards and 27 total. This would seem to indicate the road team was a much better rebounding team, as they came away with an offensive board on roughly one-third of their misses, while the home team got the offensive board roughly one out of four misses. The fourth quarter both got four offensive boards, the road team on 14 misses and the home team on 12, essentially flipping the margin. I think it's extremely fair to say that the road team was a much better rebounding team for three quarters, which is why the final ratings were so close - strong (low) is basically a fart away from respectable (high).
The only thing I really ever find useful for looking at rebounding is what percentage of available offensive boards a team pulls down - telling me a team gets 20 offensive rebounds in a game doesn't really differentiate between a team that's dominant on the boards and one that just missed 80 shots and had an average rebounding effort.