Taylor Swift's Dear John About John Mayer Relationship

Taylor Swift'S new song, 'Dear John', which features on her upcoming album, 'Speak Now', was written about the singer-songwriter John Mayer, according to a Yahoo music columnist who reviewed the album. The song reportedly confirms that the couple had a relationship which turned sour.
During his review of the record, music writer Chris Willman analyses the chorus of 'Dear John', and concludes that the track is referring directly to 33-year-old Mayer in the lyric, "Dear John, I see it all now that you're gone, Don't you think I was too young, to be messed with, the girl in the dress, cried the whole way home, I should've known", and it is suggested that the song mentions the age difference between the two in the line, "It was wrong, don't you think nineteen's too young, to be played, by your dark, twisted games, when I loved you so".
In an interview with Willman himself, Swift spoke about the inspiration behind the new tracks, saying, "They're all made very clear. Every single song is like a roadmap to what that relationship stood for, with little markers that maybe everyone won't know, but there are things that were little nuances of the relationship, little hints", before adding, "And every single song is like that. Everyone will know, so I don't really have to send out emails on this one". The new album is set to hit shelves on 25th October 2010, and the first single 'Mine' was released on August 24th 2010.