I got very familiar with what it feels like to be at a particular level of of sleep deprivation in the course of adaptation, so I think my subjective opinion there is probably not so far off, but I agree I can't really expect anyone else to have much faith in it.

I've attended one go tournament since I started, and I achieved a result better than my last few tournaments. OK, and I just beat my record at freerice.com. Other than that it will be difficult to come up with good data, as I've never taken an IQ test in my life. I should have taken an online one at least before I started, but I didn't think of it until it was too late, and I don't really trust the online ones anyway