I think I drank so much mt dew in my EQ days that I'm completely immune to caffeine. Coffee has never done anything for me and a soda never peps me up.. I learned on my trip here that I can take 5 no doz and feel absolutely nothing from it and still fall asleep.. I figured after 5 it was time to not try anymore because I didn't want to get sick.
I don't know, I wish I could be one of those people that all the sudden focuses better after a cup of coffee.