I'm not a regular user, but I have a curious glance at the front page now and then, and I tend to see a lot of questions bumped to the top by trivial edits - for example, adding a space before a punctuation mark. They're often older questions.
It seems like most stackexchange sites try to avoid this, because it prevents actual recent activity (new questions and answers) from being visible on the front page. For example, on the Food and Cooking site, recipe requests aren't allowed, so the recipe tag is not terribly useful, and I've been gradually removing it, so as not to bump many questions at once. Why has the French stackexchange taken a different tack?