A President's Honeymoon Period? Nah

Somewhere in a grad school history course I read an essay that outed the "first 100 days/honeymoon period" of a Presidency as a media creation that didn't have legs. IIRC, Carter was the example used in the essay, which, again IIRC, was in a collection entitled "After The Fact." For that reason I've never paid any mind to such nonsense, no matter who was in office.