"Rationality" as used around here indicates "succeeding more often". Or if you prefer, "Rationality is winning".

That's the idea. From the looks of it, most of us either suck at it, or only needed it for minor things in the first place, or are improving slowly enough that it's indistinguishable from "I used more flashcards this month". (Or maybe I just suck at it and fail to notice actually impressive improvements people have made; that's possible, too.)

[Edit: CFAR seems to have a better reputation for teaching instrumental rationality than LessWrong, which seems to make sense. Too bad it's a geographically bound organization with a price tag.]