It's not that light, i used to run a spech p1 2005 with 36's and bombshells and that was just under 28lbs, it could stand to lose more weight like the cranks for example (evolves?) if they are then a switch to atlas FR would lose a fair bit
the 09 frame is easily a pound lighter then the 05, its a 36 float, and there are RF Altus AM cranks on there, and the Industry nine hubs and spoke save a tonn, almost nearly 2 pounds over a normal syncros AM ds28 wheel set