I didn't see the Sirius/Remus thing, but that might be because I was so focused on Remus that everything else faded into the background. The Prisoner of what?

But I get the feeling that Remus is often perceived as gay even if there was no Sirius in the case. There have been many posts lately about how "Rowling took a perfectly gay character" and gave him a beard.

Hm. I am not at all impressed by the contamination through the movies. Especially since I don't really like them myself and it confuses me when movie canon is suddenly established.