Time Jump

[redninjawinz.livejournal.com]

I have a question. I was under the impression that the manga time jump was only two and half years. I'm pretty sure that's what it said in chapter 245. I even just went back and re-read it and I still see it saying 2 and half years. If it was only 2 and half years wouldn't the Konoha rookies all only be 14. I thought the only ones who would be 15 were Gaara, Lee, Neji, and Tenten. I could be wrong but I don't understand how the Konaha rookies would be 15.