Anna Salamon and I are confused. Both of us notice ourselves rationalizing on pretty much a daily basis and have to apply techniques like the Litany of Tarski pretty regularly. But in several of our test sessions for teaching rationality, a handful of people report never rationalizing and seem to have little clue what Tarski is for. They don't relate to any examples we give, whether fictitious or actual personal examples from our lives. Some of these people show signs of being rather high-level rationalists overall, although some don't.
I wouldn't necessarily expect there to be a super-strong connection between not rationalizing and being a "high-level rationalist". There are other ways to go systematically wrong than through goal-directed rationalization. As a possibly overlapping point, your concept of "high-level rationalist" probably sneaks in things like intelligence and knowledge that aren't strictly rationality.
Eliezer's "formidability" seems even worse, with its implications of high status.