Is JKR releasing the info about Dumbledore ual orientation irrelavent to the story?

I agree. I also think it adds to the idea presented in the 7th book regarding harry and Dumbledore. The Daily Prophet runs articles inferring that Dumbledore had ulterior motives of a possible pedophilic nature for Harry. If the Wizarding world was to ume that Dumbledore was gay, then it would make much more sense to have the Prophet use that as more motivation for that idea.