Orwell gives the same advice. But he is talking about non-fiction (mainly political) writing. I don't recall his novels as being Hemingwayesque.

An amusing effect of Hemingway's use of short words and sentences is that (at least when I was young) his books get set as texts for readers who are too young to get the point. I was made to read The Old Man and the Sea at about 13, and thought it was utterly pointless - he didn't even get to eat the fish at the end. (I see Testname below had the same experience with Farewell to Arms).