Trust me, you can feel a 250g difference when your bikes 8.8kg to start with. It all adds up anyway, If you get 2 bikes next to each other, where one is 10kg and the other is 8.5/9kg, the difference is massive. I know because I did it. I was in between bikes at the time, but still, the difference was massive. EDIT: The one nearest had my 06 short frame on there, once I got my 08 Long I built it up with my 07 long to compare, the geo was almost identical between the 08 and the 07.