Jamers is 100 correct. I also have seen it first hand. Are there exceptions, yes, i was one of those also. Here it goes, I had a shat load of pic turbo prop time at a regional, was told to my face at JetBlue interview I needed jet time, at a Airtran interview the exact same thing.....they even went on to say that I would most likely not be successful in their training having only flown turboprops! even though i have never failed any check ride in 15 years. I was hired by delta, miracle to have even gotten the interview with only turboprop time. In class hiring cord was asked by a new hire if one of his friends was on the next list, asked his name he looked it up, he was a colgan prop captain, point blank he said"your friend needs to get on a jet"