I'm 38 and have been programming since I was 8. 30 years. In those 30 years, outside of prescribed variable names in high school AP Comp Sci exercises I don't believe I have ever once used foo, bar, baz, or any other metasyntactic variables in any of my programs or documentation. I tend to be more descriptive than that. I'll at least go with do_the_thing(input1,input2). None of this f(foo,bar) nonsense.