While on the subject, anecdotally speaking, my modeled VO2 max on WKO4 is currently 64.2 and 394 watts. I won a 1/2/3 masters crit yesterday, so while my fitness isn't at an elite level, it's not at a cat 3 level, either.
Comparatively, my all time peak is 69.5 and 427 watts when I was at an elite level and racing competitively (sorta) nationally.