Maybe the truth is not in how many would have kept him, but which ones. I suspect that the clubs who don't ditch managers at the first sign of regression often reap the rewards of a little patience and a 'big picture'. In that case 'not many' becomes irrelevant. I know what you're driving at, of course, and you are certainly right when you later posted about what it'll be like if he stays and we start poorly next season, but most football clubs come across as being run by a wide variety of nut jobs.