Grunts resenting flyboys?

Maureen Dowd, regarding the Wesley Clark distraction, in today's NYT:

This is not even about Obama. It’s the old business of grunts resenting flyboys. Bob Dole made a crack long ago about patrician Poppy Bush flying over the infantry. And Clark, as Fred Kaplan writes in Slate, “was an Army infantry commander during the Vietnam War while McCain was a Navy aviator.”