It's a Yeti so it will be gorgeous whatever it is. I'd love it if there were a 29 Asr in the works, though I know it's not a popular concept here. In time. However, I don't think that the drop from the head tube to the bb is enough for a 29er, so it's probably 26. If that's a pivot point above the bb it's quite high...that triangle is only tacked, so all the bits may not be there yet. Real teaser.
This summer Yeti is going to launch a substitute to the 575, which will remain on the catalog on a more affordable version. This new 6 inches rear travel bike will use a suspension designed by David Earle, one of the smartest american engeeneer with Dave Weagle. The system is based on a main pivot mounted on a mobile eccentric, as confirm the patent deposited by Earle. The target is to obtain a vertical wheel axle path, with a high chain extension on the beginning of the travel (for anti bobbing) and a low chain tension in the last part of the rear wheel movement. Wait till this summer for the final design !