I don't think any of that addresses the main point: what has Eliezer done that is evidence of good moderating skills? Who has Eliezer banned or not banned? etc.

The question isn't: "can Eliezer spend years cranking out high quality content on the excellent Reddit codebase with a small pre-existing community and see it grow?" It is: "can Eliezer effectively moderate this growing community?" And I gave several examples of how he had not done so effectively before LW, and has not done so effectively since LW.

(And I think you badly underestimate the similarities of Wikipedia during its good phase and LW. Both tackle tough problems and aspire to accumulate high quality content, with very nerdish users, and hence, solve or fail at very similar problems.)