On Wavescan, I heard two comments by Allan Weiner on their new 500 kW transmitter. In one statement, he implied that the transmitter is already DRM capable and in the other statement he implied that it will be. So, you decide if their new Continental 500 kW transmitter is capable of transmitting DRM.
Thankfully, we can assume it will be shortly capable of transmitting DRM if not already. If it is already capable, I'd like to see some tests of that capability.