I would suggest not taking Lumifer's description of his initial impression of the sign-up page as indicative of the app itself. I think there's sufficient evidence of Lumifer being not unbiased in describing Intentional Insights content. So consider checking out the app itself.
Here are the study proposals themselves, which you can evaluate yourself for whether they are A/B split testing: 1, 2.
EDIT Forgot to mention, my comment on the nature of NancyLebovitz's question had to do with my own desire to signal that this is a very important question to me, not give praise.
Richard Kennaway has posted about an edit war on the wiki. Richard, thank you.
Unfortunately, I've only used the wiki a little, and don't have a feeling for why the edit history for an article is inaccessible. Is the wiki broken or has someone found a way to hack it? Let it be known that hacking the wiki is something I'll ban for.
VoiceofRa, I'd like to know why you deleted Gleb's article. Presumably you have some reason for why you think it was unsatisfactory.
I'm also notifying tech in the hope of finding out what happened to the edit history.