I still feel like me--that is, I don't feel stupider--but I'm definitely slower and less able to do math in my head and more liable to get stuck verbally. Nobody except Jeff really notices. He says I'm more on his level now . . .
I never felt significantly different. My memory was still good (Jeff got all my usernames and passwords for web billing from me early on) and I could read in several languages right away. But my head hurts when I think too hard. It's not funny, but it should be.