I think most people get over-sold blotters. Every now and then there's a study checking how much LSD is actually on sold-as-200ug blotters, and it's typically 60-80. This also leads to heavy overdoses when getting your hands on actual 200ug blotters...
FWIW I once got super high from a bottler. So high that I suspected it was either over dosed or even not LSD. I sent a similar one for analysis. Turned out it was pure LSD and about 125mg as advertised.
