I hear this a lot and it always pisses me off. Part of what I believe gives me value is that I can recall from memory most of what I do day to day without looking it up. I have coworkers who are good, but possess terrible memories. Most are semi impressed with I rattle off a shell script and all the flags needed to get it to work on the first try.

I think the anger comes because I see it as a cop out, and I feel I get the short end of the stick in interviews because of it.