Note that it is possible for newcomers to hold the same inaccurate beliefs as their predecessors while the core improves its knowledge or expands in size. In fact, as LW grows it will have to recruit from, say, Hacker News (where I first heard of LW) instead of Singularity lists, producing newcomers less in tune with the local truth.

(Unnamed's comment shows interesting differences in opinion between a "core" and the rest, but (s)he seems to have skipped the only question with an easily-verified answer, i.e. Newton.)