Think about it, yeah. Mancini is Inter, so people are put off. DD didn't do amazing in Serie B, so he is risky. Rafa's team has just conceded 2 goals to a team which the majority don't play football full time. Capello, I don't know, some don't like him because of his decisions.
Nobody wants to take a risk, they want proven people. Mourinho = proven. Ranieri doesn't. Ranieri is a risk and I don't think people want to take another, now we know what happened. He had a team of world class players at Chelsea with all the money, and he couldn't win anything. Next year Mourinho does a bit of cleaning up, gets some players of his own, and they dominate.