Note that we are the only node that was tested over an Internet connection.
According to his tracking, we download about 2.5% more than others. This is the result of aggressively dropping peers with blocks partially transmitted. Otherwise we don't perform any redundant downloading of blocks.
Also I was able to verify that despite the 32GB RAM, the maps were thrashing due to low CPU (12 slow threads). We'll need to do some more testing to find out where the CPU limit should be set for a 32GB machine.