[virtualwhys]

Same.

Are you able to clearly manifest an image of anything in your mind's eye? If not then you might have aphantasia (i.e. "third eye blind").

When I was younger I sat several Vipisana and Zen retreats across multiple traditions. While it changed me in the sense that I became far less impulsive and more grounded, there was never anything mystical about the experiences, just periods of calm and quiet, like the internal world had slowed way down.

But that's unusual, I suspect most who seriously take up meditation do indeed have full blown psychedelic experiences (thus the author's reference to LSD), not long after taking up practice, and certainly within the first week long retreat or two.