When compared to some newer, more agro, frames (Nimble9, Chromag Rootdown, Spot Honey Badger) the KM can seem a little "outdated", even it it was revolutionary in its time. It may also seem like some of the updates may be more bandaids to keep it alive, rather then make it "better". But IMO the KM is, and always has been pretty spot on. At least geo wise, the way you had to take the wheel off the old ones was pretty dumb.
But now that you mention it I'm interested to take some measurements with the 100mm fork I plan to use. 80mm forks basically don't exist, not to mention the OPS comes with a 100, so it seems a little silly to list the geo based on one.
It's also a little funny that a guy that works in a store that isn't cool enough to sell Surly, and had to buy his frame at a competitor down the street, noticed this issue.
Anyways, hopefully I can get the new frame built up soon and start riding it. I really do love the feel of the KM. Cheers to Surly on that one.