Listen. Hear that distant rumble of thunder? That's the sound of traditional ad agencies stampeding into the world of digital just as fast as their Hush Puppies will carry them.

The data points below, just released by eMarketer and Forrester are startling, not for pointing out the strength of the resilient areas of B2B marketing (pretty much what you'd expect if, like us, you work in B2B) but for showing the depth of the collapse in traditional forms of advertising. By my reckoning five of the bottom eight categories are core service offerings of traditional ad agencies.

No wonder all those ad agency types are furiously reinventing themselves.