Maybe so Engine but on my sites, the mobile ads are doing well, not quite as well as on the main site but better than expected. Everyone's mileage will vary depending on what site they have.
The question I was posing though was about in-text ads, in particular, on mobiles. They just don't work on mobiles at all basically. So how will all the in text ad companies react, especially as right now their income must be falling in direct relationship to the increase in the use of mobiles?