I didn't notice any Objectivist influences looking through the high-level claims on the Leverage website, but their persuasive style does remind me quite a bit of Objectivism's: lots of reasonable-sounding but not actually rigorous claims about human thinking, heavy reliance on inference, and a fairly grandiose tone in the final conclusions. I'd credit this not to direct influence but to convergent evolution. To Leverage's credit, Connection Theory does come off as considerably less smug, and the reductionism isn't as sketchy.

Now, none of this is a refutation -- I haven't gone deep enough into Leverage's claims to say anything definitive about whether or not any of this stuff actually works. Plenty of stuff that I'd consider true reminds me of Objectivism's claims, or of those of other equally pernicious ideologies. But it's definitely enough to inform my priors, and it should shed light on some potential signaling problems in the presentation.