I have been hearing the digital buzz on 156.210 for at least a year, sometimes right over the top of the analog repeater. I usually have to lock them out of the scan list when I'm in the truck.
Based on some DFing I've done, the source of what I have heard is not in Lawrence Co, but seems to be coming from somewhere around Horseshoe Bend.
Not saying they aren't switching, but this has been going on a while, and I heard the analog repeater just a day or two ago.