Newsweek did an okay article about pit bulls this week
There aren't 61 million dogs in the US (2007 US Pet Census says 72 million). There aren't concrete numbers on American Pit Bull Terrier or American Staffordshire Terrier populations. And, I think many dogs, including many APBTs, would make acceptable guard dogs - resource guarding is a pretty well-established canine trait found, to some degree, in most dogs.
I really shouldn't complain too much, right? I mean, come on, it's Newsweek. You may take that comment in any manner you see fit.