Liraz Siri - Mon, 2011/07/04 - 10:46
In a nutshell, think of your users.
They read top to bottom. They have a very limited attention span. Even if they read all the way through, they're probably going to pay more attention to things that come early. Before patience runs thin.
So your goal is not only to describe changes but to figure out now to communicate as much value to users before they lose interest. If you do a really good job, you might actually prevent them from losing interest and they'll read all the way through. Don't bet on it though...