User blog comment:Kmbfsu11k/Anger Management?/@comment-493809-20131129075750/@comment-5398287-20131130063056

Vasto Lorde? You mean Zangetsu's New Hollow Form?

...I don't recall it ever being stated that he was a Vasto Lorde at the time, since Vasto Lordes can only BECOME Vasto Lordes by consuming other Hollows, which Zangetsu hasn't done.