Well, I'm not putting Ultegra on my Jamis. I always take a little look at the arrows on the shifters on this bike, because I only ride it maybe once a week. Sometimes, I'll be riding up a slight hill and think, gee this feels hard and I realize I'm in my big ring. This never happens on my road bike. The mountain gearing on the Jamis throws me off a bit, too, but I just deal with it.
I don't think it's my age, I never have been able to remember any sequence of things when it is in the physical/mechanical domain. Using a computer is not fun for me, although the Internet always seemed just like the library, so that's not been a problem. I had a lot of trouble with remembering how to shift when I switched to the road bike from the mountain bike with slicks, but I eventually got it.