I'm a little skeptical about that. I wonder about having two considerations (benefits/drawbacks) apparently boiled down to one number. I'd hazard a guess that

I'm a little skeptical about that. I wonder about having two considerations (benefits/drawbacks) apparently boiled down to one number. I'd hazard a guess that the level of enhancement both bring are about the same for many people... but that the drawbacks of caffeine are more or less something that everybody's used to. For me, using adrafinil to get by on less sleep was considerably more desirable than using caffeine. Then again, the drawbacks of caffeine are strong enough for me that I generally don't use it, so I might be an outlier.