I agree. I don't recall any time in my career of over 30 years where anyone has shown signs of homophobia, and I have worked with openly gay men and women, plus, presumably, a number who were not open about it. I don't think it's ever been an issue - and this is in a rather laddish environment...
I've said for a while that the first footballer to come out, provided he is reasonably marketable, will make a bundle in endorsements. The only downside I can see is the remaining few dinosaurs in the stands.