Looking back today, the improvement seems smaller than I thought then, and LW seems to have played a smaller role in it.
I used to be very skeptical of Eliezer's ideas about improving rationality when he was posting the Sequences, but one result that's hard to deny is that all of a sudden there is a community of people who I can discuss my decision theory ideas with, whereas before that I seemingly couldn't get them across to anyone except maybe one or two people, even though I had my own highly active mailing list.
I'd say that being able to achieve this kind of subtle collective improvement in philosophical ability is already quite impressive, even if the effect is not very...
Previously: round 1, round 2, round 3
From the original thread:
Ask away!