I totally disagree with that. Facebook sorely lacks such a feature, and the lack of it has led to "spammy" messages from so called "friends" you barely even know, or care about in your list.
Google+ seems to solve a lot of issues with Facebook. And I think even non-techies can be relatively easy convinced to use it once they see how it works. Basically, Google+ looks like a huge leap over Facebook because of all those neat products tied together. People will switch from anything as long as there is a big leap in benefits, and I think Google+ offers that.