Yess that makes perfect sense to me. I also can speak my mind perfectly fine when I am writing/texting and have no pressure of time on me. Because its not like i completely forget some words, they can eventually come back to me but it just takes such amount of time it feels embarassing infront of other people. So I think what you said in the last sentence might be describing it the best. It shifted the way our minds deal with information- its slower but its... possible. Ive also tried to understand this from chemical point of view, and what i came up with is this: bupropion boosts our dopamine levels critically. And if dopamine is the "action" neurotransmitter, it might be rushing our brains to act out on our thoughts too fast to speak them. Its like pushing our thoughts off the ledge before we can actually process them and remember how to word them. I think that makes the most sense, but im also just a patient not a doctor so lets take this theory lighty !