[Alex3917]

"Reading the comments it seems that a disproportionate percentage of the subjects were into meditation (a number of them report 'increasing meditation')."

I haven't read this study yet, but I know that Johns Hopkins is doing another study where one of the groups actually takes meditation lessons for six months before taking the drug. These studies are mostly meant to validate the methodology and to demonstrate that they can be used safely in a well chosen population when done under professional supervision. It's not really meant to accurately measure what percentage of the population at large would be able to safely achieve ego death and/or have a primary religious experience.

Also, I agree with you that medical studies are generally sketchy, but these aren't medical studies. These studies might eventually be used by a drug company in convincing the FDA to grant a new drug investigation permit, but probably not for at least another 5 - 10 years.