I'd even go so far as to say I'd wait until our library catalogued it. And sometimes that takes awhile. (Just last month, we started using netflix)
I will add that we don't have TV, so 1. I'm not always aware of the latest movies, and 2. there is a backlog of TV shows that I catch up on. I'm guessing that I can wait til it was out on DVD in first place, I can wait 28 days. I think that it is dumb to make us wait. I'm only likely to buy a DVD if I've already seen it, and I think wow it is THAT good, ya know?