Sure, other governments "[route] all digital traffic in the country through a single choke point, using the capabilities of deep packet inspection" and so do we, in the US. I couldn't think of a better place to put fiber splicers than the "AT&T office in San Francisco." Facebook, and of course other social networking and technology companies, must be a gold mine for them. All they need to do is connect the social networking dots, as they currently do with American's phone calls -- there's no concern for domestic wiretapping laws involved -- it's simply call delivery data for them, and a bit of connecting the social network dots. Hence the reason Verizon Wireless sent out a snail-mail privacy notice to their customers regarding their use of call delivery records in light of the possible broad-surveillance lawsuits, a few years ago. One doesn't need the full conversation if it's possible to ascertain and forward onto other agencies the usual suspects. Separately, Larry Wall, the creator of Perl, once said that he doesn't "tell people the NSA uses Perl. [He merely tells] people the NSA thinks everyone uses Perl. They should know, after all."
Those are smart scientists and engineers over there, to be sure. I'd love to work for them, too.