that's because it's not reliable, it's subjective,
proly placebo effect for the most part.
that guy's thread has been gone over with a fine tooth comb
and it just doesn't check out. hence the lack of fanfare.
To asses the claim, all we really have are subjective reports. My own results were more than placebo, which of course can be endlessly debated but I believe is true.
As I remember it, most of the fine tooth combing was done intellectually. Not many people actually tried it. There is a lot of variation of perceived effects with regular mushrooms (no juice or any other modification) so I'd expect a similar amount of variation with the lemon technique. For me, it works great. Hell, some people can smoke a huge pile of Salvia and not feel anything, but I wouldn't argue that those who do are experiencing a placebo effect.
To anyone who checks out that thread, I'd like to add that I'm only talking about the lemon juice; I have not tried the currant juice idea.