Can't answer your statements as I was not there but I can say from my times there in nasty weather, they do a heck of a job.
I was there about three years ago conducting a De-ice audit in Blizzard like conditions. I was riding with the vendor to the Pad and it was 'White Out' conditions. We dang near hit a plane at a gate it was so bad. The Radio blasted Ground Stop which was for vehicles too so we did. It was snowing so hard sideways I could not see the front of the hood. We finally made it to the pad and I watched from the Pad Tower and was amazed at how effective the crews worked to keep aircraft moving. My guess is, if the WN plane was sitting there for 2 hours they weren't plowing that taxiway, unless John Deere plows like Red Belly airplanes.