I've just seen this article on the Guardian website, headlined "Jobcentre was set targets for benefits sanctions". A leaked email proves that, despite Mark Hoban's denials, there are league tables for Jobcentres' "success" in punishing people, and the information to compile these tables could only have come from the DWP. The author of the email, a JC manager, says that she has been warned to "show an improvement", and that sanctioning only 6 people out of 300 is "not credible".
It's embarrassing for the DWP and for Hoban. But, as usual, only the Guardian has published it. Do tweet the article if you can.