Marco Arment, creator of Instapaper:
RSS is a great tool that’s very easy to misuse. And if you’re subscribing to any feeds that post more than about 10 items per day, you’re probably misusing it. I don’t mean that you’re using it in a way it wasn’t intended — rather, you’re using it in a way that’s not good for you.
Whoops: a couple hundred items each weekday. Oh well.