90ug above average? Hmm i wouldn't be buying estimated 90ug acid and saying it was above average. Back in the lovely days of plentiful clear liq and Hofmanns/Shiva's/Polys, you'd be stretched to find anything under 150ug estimated. Aussie laid acid sucks. You know when you've got EU or N. America.
I know you can't buy acid from a supermarket and you get what you're given but its sad hearing 90ug as being above average.
Yeah look, I'm not actually sure at all, I'm only guessing by comparing my effects to Erowid's descriptions. But I'm a bit confused now, because I just read D M Turner's chapter on LSD, and he claims you'll only get threshold effects from a 100mic dose. Well if that's true, the tabs I'm describing were significantly more powerful than 90mics.
First I took about 45% of a tab, and got a light experience, above threshold but not by much. Mind expansion, enhanced creativity, euphoria, almost no visuals. The next week I took the full tab, and got a full, kind of light-medium acid trip. My mind was definitely warped, euphoric and relaxed, but I was completely able to hold conversation and fully coherent thoughts, and I only lost concentration and zoned out every now and again (especially when I smoked some weed with it later). Things got distorted when I focused on them, or made brilliant patterns (saw the face of God form out of the stars in the night sky) but remained stable when I wasn't focusing on anything.
From what I understand, that makes the tab about 80 - 100mics, but I'm definitely not an expert, so maybe it was a lot higher than that. At any rate: 1 om tab makes for a good light-medium experience. I'm taking 1.5 next time for a full medium.