I never use Wikipedia as a main source given that I know too many people who like to enter total BS into some entries and giggle like crazy people when, years later, the BS they entered is still there and has been expanded on. I used to have another paper that took the same position as Foot (who's an academic, not "some guy") but it doesn't seem to be online anymore. So yes, for me, Gen X is the 1960-66 gang.