I saw the article on Dumbledore as well - I took great fun in telling easy child 2/difficult child 2 to see her reaction. Much the same as mine, really. Why would JK Rowling come out with this NOW, after the book is thoroughly released and the series is completely done? It's not as if it's a teaser for the next novel.
Frankly, I think she's just being provocative. Not sensible, in my opinion, if that's all it is. Although maybe the publicity will sell more books.
husband is also very sceptical about her motives. And reading that part of the novel - why does Dumbledore's relationship with Grindenwald have to be a sexual one? Why does it ALWAYS have to be put down to sex? Can't people just be good friends? Whatever happened to friendship?
And yes, it IS fiction. But fiction, especially when it's so thoroughly publicised, should at least be consistent within itself. I'll just have to put this down as yet another internal consistency in the series.
Marg