Нет. Соврал:
http://cm.bell-labs.co/who/dmr/chist.htmlНа PDP-7 сформировался язык B. Там, кстати, уже были операторы ++ и --.
"Thompson went a step further by inventing the ++ and -- operators, which increment or decrement; their prefix or postfix position determines whether the alteration occurs before or after noting the value of the operand. They were not in the earliest versions of B, but appeared along the way. "