I am fascinated by what I perceive to be a paradox: people who say "I'm not racist" are more racist than people who can acknowledge their racism. If only to themselves, which might keep them from staying stupid shit like "I'm not racist, but there sure are a lot of black people in this city!" For example.
Now, with homophobia, perhaps the paradox doesn't apply as consistently because it's perceived by many as an acceptable prejudice.
I have a friend who openly acknowledged being grossed out by the gay parts of "Six Feet Under" -- ew, gay stuff! Ew! And yet this man, according to my Dar, and regardless of his (bossy, controlling) girlfriend, is in a state of undealt-with gayness. So maybe those who acknowledge their homophobia are on the bubble, about to either come out, or flip over into the light of acceptance. Butterfly wings a-flappin.