It used to be the kind of stress I enjoyed because I was the guy who could be counted on to come up with a solution to really hard problems. I still am no slouch, but the biggest thing I notice is that I can't keep track of as many data points in my mind as I could before. If I have to jot things down it makes me think with words and work my way slowly to those "Aha" answers that came very quickly before. It's hard to explain, but I can think through logic without words if I have all the data in my head. I used to be able to do that thought process with more complex logic than I can now. There is a small chance that my current job gets funded and actually becomes less demanding. That would be the best plan...

EDIT - I thought of a way to explain thinking without words. Quarterbacks do it all the time. Going through their reads, sensing pressure and scrambling, dumping a pass off to a back after a pump fake to keep it from being batted down. They don't think through those decisions with words.