Comment Re:Mounting evidence - of hype. (Score 1) 335
I know at least one person to whom several beers is as intoxicating as a cup of coffee. Are you saying this person is physically as intoxicated as anyone else who drinks that much, or legally intoxicated as much?
Wow, you are not just talking about two different drugs, but two drugs that are in completely different families. One is a stimulant and one is a depressant. How on earth can you compare them to each other?
Now in regards to your question, the answer is both. Humans differ greatly from one another but, on average, reaction time correlates to blood alcohol content. Tolerance is not part of the equation. We are talking about how a chemical effects signals that propagate through the brain. It's all chemistry - no amount of tolerance can change that. Do a search on scholar.google.com if you don't believe me. I wasn't able to find much with regards to tolerance but those studies which correlate reaction time to blood alcohol content generally result in findings that leave no room for outside factors (like tolerance).