I bought one of the carbon Evo frames from Bikescene and built it up Saturday. Build is X-Fusion forks, 1x10 XTR, and carbon Roval wheels. All-in, the bike weighs 26.2lbs with a dropper post, with the frame weighing 5.6lbs including BB and seat-clamp.
To date, I've only done the one ride - a 20 mile loop through the Surrey Hills taking in St Martha's. That said, I think this bike is the one that has impressed me most for 1st ride impressions. The light weight and being a 29er mean it climbs well, esp in the climb setting on the RP23, but perhaps not as well as the Intense Spider Comp 29er I tested or other DW / VPP linkage bikes, but not far off.
On singletrack and descents though, this bike blew me away. The combination of 29er, relatively slack HA, and suspension design meant it was stable and supple encouraging v quick speeds, but what surprised me most was how fun it was. You end up looking for every lip to boost, every bank to wall-ride / hip etc, all stuff you don't expect from a 29er.
Putting an element of science into this, Strava times were quite telling - 30 mins after jumping onto the bike, I put in a personal best down Barry Knows Best, a trail I've ridden 100s of times on many different bikes. Further evidence of the speed of the bike came from my riding buddy who is generally a quicker rider than me struggling to keep up on many sections of trail. In fact the bike was so quick and laterally stiff over the rocky stuff, it started to show the limitations of the Roval wheels.
As I say, this is only 1st-ride impressions, but as these go, I'm hooked and can't wait to get my next fix! As a result, I've immediately sold my Ibis Mojo HD!
I should also add that the above probably also applies to the regular Stumpy FSR 29er. My mate got an S-Works version at the same time and rode with us on Sunday, with similar results as measured by Strava and general observations about his riding speed.
Worth noting that I also ride a Camber 29er and a Yelli, so this isn't just a 29er thing! In fact one way I've described the bike is like a Yelli with 135mm suspension!