A Tunisian opposition leader was just assassinated, presumably by an Islamist, and massive demonstrations have broken out all over the place, the biggest since the revolution. The headquarters of Ennahda—the sort-of-but-not-exactly “moderate” Islamist party—was set on fire. So the government dissolved itself, appointed technocrat stand-ins, and promises speedy elections.
Tunisia has all sorts of serious problems, but I can’t imagine the Egyptian government—and obviously not the Syrian government—handling a crisis by firing itself.