I generally agree. I think Uncle Bob has recently realized all his advocating without public explanation causes a lot of confusion. He's been blogging quite a bit this past month, two posts of which are related to mocking:

http://blog.8thlight.com/uncle-bob/2014/05/10/WhenToMock.htm...

http://blog.8thlight.com/uncle-bob/2014/05/14/TheLittleMocke...