If you find commercial breaks as aggravating as I do, its worth the investment to get an ipod and a subscription rush 24/7. You'll be able to listen to him on your own schedule, in parts or in one commercial free 108 minute dosage.
This may also acct for rush's numbers going down, as many people are moving to his subscriber side. These people won't be measured by the numbers reflected here. It may also lift other hosts numbers as people can now listen to others during their usual rush timeslot as they finished listening to yesterday's show early.