I think what I was trying to get across is that you can do things more in a blog post styles as opposed to Twitter style quick bites. But maybe you're right it's not worth mentioning. The copy for the site hasn't gone through any focus group testing or anything like that.
Rich text formatting definitely is a plus for me in a social media app! I think it's better to specify such things, especially for users coming from Facebook/Twitter/etc with Facebook/Twitter-like expectations.