The reason people are speculating and why the story is annoying, is that the Daily Mail are featuring it as a main story with a lot of detail.
It's very very PR drenched and hard to really understand why it's in the news, until you start to think why it could be...
This x1000. As far as I know he never really pimped his relationship like other celeb couples do. Just a few papped outings here and there throughout their courtship. Now all of sudden he's sharing with the world about the break up. Whether he is or he isn't is totally subjective but this whole thing does stink a little. Whatever the actual reasons are behind his blabbing.