I most certainly don't think that. I'm not so sure many people on LW think that. The part of your map that talks about others' maps looks suspect.

Perhaps, but in practice I see appeals to the sequences or a well liked article taken as very strong evidence for a position and almost never is the central point challenged.

I certainly wasn't expecting everyone on LW to head in a more empirical direction in practice, that would be silly, since even filling out a form takes some time. I was hoping LW could become a place where projects like this do happen and are encouraged. Much like currently careful high quality scholarship does happen and is encouraged. That's the reason I cited the positive effect of lukeprog's article as an example of the kind of a sufficient magnitude of change.