Generally, barring accidents, do vegetarians live longer and better?

I really didn’t feel like cooking last week so I broke down and bought a cheeseburger for dinner with everything on it. I loved it. I felt slightly guilty; I have all but given up beef but I admit to eating poultry and fish.
So what are the stats on vegetarians. I realize thousands of cigarette smoking, beef eating people live a very long time but they’re the exception, correct?