We all project/assume based on the bubble we live in.

In my 18 years of in-house software dev experience (several countries, companies of different sizes), not once have I even heard (in the real world, not online) of people using any sort of drugs like the ones mentioned in the article.

I'm not saying that you're wrong. But based on my personal experience, I also could bet the opposite of what you're saying and feel just as confident.

I assume, like myself, most people taking them don't talk to their coworkers about it.

Doubly so if they're taking them illegally

I know some people who take party drugs. I know alcoholics. But coworkers who routinely take performance enhancing drugs other than caffeine at work, not one.

I guess it depends on your environment. Silicon Valley seems particularly prone to it.

The only drug I have seen people use at work is diluted favoured ethanol and coffee of course.

50%? from experience its closer to 80%

I wonder what the correlation is between "ADHD over-medication" and "new JavaScript Frameworks published"

Whoa, it's just caffeine where I live. I don't think I've seen more than 10% of the team to use anything else.

It would be an interesting study, though.