That's what JKR has said in an interview. (See article below from Entertainment Weekly)
Seven years after putting the finishing touches on her Harry Potter books, J.K. Rowling is having second thoughts about romantically pairing Hermione with Ron. Some fans of the books never warmed to the idea that the bookish girl and the clumsy but loyal red-head were meant to be — especially since Harry and Hermione always seemed so perfect for each other. Now, in an upcoming interview with Emma Watson in Wonderlandmagazine (and teased in today’s Sunday Times), Rowling admits that she might have done things differently. “If I’m absolutely honest, distance has given me perspective on that,” she told Watson, who’s guest-editor for the magazine. “It was a choice I made for very personal reasons, not for reasons of credibility. Am I breaking people’s hearts by saying this? I hope not.”
“I wrote the Hermione/Ron relationship as a form of wish fulfillment,” Rowling said. “That’s how it was conceived, really. For reasons that have very little to do with literature and far more to do with me clinging to the plot as I first imagined it, Hermione ended up with Ron.”
Watson didn’t seem shocked by the revelation, telling Rowling, “I think there are fans out there who know that too and who wonder whether Ron would have really been able to make her happy.”
I have to be honest- I really liked the thought of Ron and Hermione together. To me, they balanced each other out. And I loved Ginny and I always wanted her and Harry to be together. So, I'm not crazy about these revelations. What about you? Were you shocked or did you always think that Hermione and Harry would have made the better couple?