I don’t think there is any ‘willy waving’ going on. Posters are replying to the question, which the OP admitted could have been framed better. If he had asked how many failures in GA training types, there would have been different answers, in my case 2 failures in about 2500. Also, the definition of a failure is subjective. I used landing with an engine shut down, regardless of the reason. I didn’t however count the engine off landings in a motor glider I used to own, where the engine couldn’t be restarted in flight. I did land it in a field once, but hand started and took off again. Those were self inflicted.