Yeah, although I had an extremely weird experience with caffeine before that has taught me a bit more about how it feels.
I was stoned at the time, so I was far more susceptible to the caffeine, and man did it make a difference. I'd eaten a lot of chocolate covered coffee beans when i got the munchies, and I got to the point where I was shaking badly, but didn't notice, and it was like i had a BAD (VERY VERY BAD) case of ADD, I could barely string a coherent thought together long enough to voice it. I would definitely have had to think hard to write anything legibly.