I wrote an article about this a while back!
Stelena? Epic? Who is Kevin et al kidding?! It's impossible to say if Stefan and Elena will end up together or not at this stage, because between now and the final season a million different things could happen. A lot of people have already mentioned Dawson's Creek: a show that initially started with Dawson and Joey but ended with Joey and Pacey. If you had asked Kevin during the first season of DC who would end up together, you can bet that he would answered Joey and Dawson. Don't believe for a minute that the writers and producers have everything figured out. They don't. They have 22 episodes per year to write for another 5 years at least. To say that the show is all about S/E is at best naive and at worst, presumptious. I don't think it is at all. If I'm completely honest, I think the show is all about Damon. He's become the break-out star, the character who garners the most praise from reviewers and critics, who gets all the best lines and steals every scene. Kevin and Julie know this. They would be fools not to. Equally, they would be fools not to take advantage of this. Damon is what draws the majority of the audience in, Elena is the female lead...you do the math. When fans have been anticipating their first kiss, (never mind love scene) before they've even become a couple, then that kind of says it all. Whether they know it or not (and I think they do), the producers have struck TV gold dust. Delena have the potential to become the hottest thing on TV since forever, and with that, record numbers of ratings and generally making the show even more talked about than it is now.
To put Stefan and Elena together at the end would be completely cliched. For all the reasons why they should be together I believe there are much stronger ones in support of Delena. As fans, I honestly think we should take everything Kevin, Julie and TPTB say with a pinch of salt, because they can go back on their word whenever they like. I believe that if Delena become more popular, more talked about and one of the show's strongest points, then Kevin will be forced to do some serious back-pedalling.
Damon and Elena will never be together. It's against the usual pattern in American series, and I don't think The Vampire Diraies will take a risk like that. Yes, there will be a lot of "Delena" scenes, but they'll never be together like Stefan and Elena.
KW and JP say that kind of stuff all the time...but they know how popular and favored Delena is, so I'm sure they won't disappoint. Also KW said the same for Joey and Dawson, but did they end up together after all? No...because people wanted Joey and Pacey more.