Yes. I've been a semi-regular reader of OCB for about a year. I think it's an interesting blog. But have I learned anything useful from it? Has it made any practical difference in the choices I make, either day-to-day or longterm? The answer is no. Admittedly, this may be my own fault. But I recall a post, not too long ago, soliciting people's feedback on "the most important thing you learned from OCB in the past year," or something of that sort. And while there were lots of people excitedly posting about how much OCB has taught them, the examples they gave were along the lines of "I learned the power of fundamental attribution error!" or "I learned the importance of continually adjusting my priors!" with curiously few examples of real differences OCB made in anyone's practical choices. This raises the question: if tweaking our rationality has no appreciable affect on anything, then how can we say we're really tweaking our rationality at all? Perhaps we're just swapping new explanations for fundamentally irrational processes that are far too buried and obscure to be accessible to us.
That said, I think things like the recent posts on akrasia are strong moves in the right direction. Intellectually interesting, but with easy to grasp real-world implications.
The problem is that even though learning to identify and avoid certain biases will affect your behavior, there's no easy way to articulate those effects. It comes mainly from things not done, not things done.
For instance, upon hearing a fallacious argument, being aware of its fallacies causes the hearer not to believe in it, where he previously would have. Or if he thinks something on his own - previously a bias would have caused him to think a certain thought, which would have led to a certain action. Now, having learned to identify the bias, he doesn't e...
Robin wrote how being rational can harm you. Let's look at the other side: what significant benefits does rationality give?
The community here seems to agree that rationality is beneficial. Well, obviously people need common sense to survive, but does an additional dose of LessWrong-style rationality help us appreciably in our personal and communal endeavors?
Does LessWrong make us WIN?
(If we don't WIN, our evangelism rings a little hollow. Science didn't spread due to evangelism, science spread because it works. Art spreads because people love it. I want to hold my Art to this standard. Push-selling a solution while it's still inferior might be the locally optimal decision but it corrupts long-term, as many of us have seen in the IT industry. That's if the example of all religions and political movements isn't enough for you. Beware the Evangelism Death Spiral!)
We may claim internal benefits such as improved clarity of thought from each new blog insight. But religious people claim similar internal benefits that actually spill out into the measurable world, such as happiness and charitability. This fact gives us envy and we attempt to use our internal changes to group together for world-benefitting tasks. To my mind this looks like putting the cart before the horse: why compete with religion on its terms, don't we have utility functions of our own to satisfy?
No, feelings won't do. If feelings turn you on, do drugs or get religious. Rationalism needs to verifiably bring external benefit. Don't help me become pure from racism or somesuch. Help me WIN, and the world will beat a path to our door.
Okay, interpersonal relationships are out. Then the most obvious area where rationalism could help is business. And the most obvious community-beneficial application (riffing on some recent posts here) would be scientists banding together and making a profitable part-time business to fund their own research. I can see how many techniques taught here could help, e.g. PD cooperation techniques. If a "rationalism case study" of this sort ever gets launched, I for one will gladly offer my effort. Of course this is just one suggestion; everything's possible.
One thing's definite for me: rationalism needs to be grounded in real-world victories for each one of us. Otherwise what's the point?