This reminds me of a comment that we almost always get on HN when Facebook comes up, and its almost always right: it's not for you. If you want Bcc, it's not for you. The millions of people who are younger than you don't think to CC, let alone BCC. They want to communicate, and they want to do it now, and email is just that formal thing Dad uses. That's their terms, and Facebook gives it to them.
The author also discounts Facebook as being some sort of Neo-AOL. It is that, but where AOL faltered was being a completely walled garden. Facebook as a development platform, and, perhaps more importantly, an online identity to all sorts of other sites, makes Facebook use even more in-grained. I would love to see some stats from sites that allow Facebook Connect on how much their user registration went up. Facebook offers a portal, but also a wider identity, and they do it well.
If Facebook isn't for you, then that's that. But it doesn't mean what they're doing is wrong.