The conclusions don't seem crazy (well, they seem "crazy-but-probably-correct", just like even the non-controversial parts of quantum mechanics), but IIRC the occasional emphasis on "We Have The One Correct Answer And You All Are Wrong" rang some warning bells.
On the other hand: Rationality is only useful to the extent that it reaches conclusions that differ from e.g. the "just believe what everyone else does" heuristic. Yet when any other heuristic comes up with new conclusions that are easily verified, or even new conclusions which sound plausible and aren't disproveable, "just believe what everyone else does" quickly catches up. So if you want a touchstone for rationality in an individual, you need to find a question for which rational analysis leads to an unverifiable, implausible sounding answer. Such a question makes a great test, but not such a great advertisement...
Choosing between mathematically equivalent interpretations adds 1 bit of complexity that doesn't need to be added. Now, if EY had derived the Born probabilities from first principles, that'd be quite interesting.
I have several questions related to this:
If you visit any Less Wrong page for the first time in a cookies-free browsing mode, you'll see this message for new users:
Here are the worst violators I see on that about page:
And on the sequences page:
This seems obviously false to me.
These may not seem like cultish statements to you, but keep in mind that you are one of the ones who decided to stick around. The typical mind fallacy may be at work. Clearly there is some population that thinks Less Wrong seems cultish, as evidenced by Google's autocomplete, and these look like good candidates for things that makes them think this.
We can fix this stuff easily, since they're both wiki pages, but I thought they were examples worth discussing.
In general, I think we could stand more community effort being put into improving our about page, which you can do now here. It's not that visible to veteran users, but it is very visible to newcomers. Note that it looks as though you'll have to click the little "Force reload from wiki" button on the about page itself for your changes to be published.