They're running in a datacenter in the netherlands with a ridiculous amount of bandwidth. I did find out they're classified as an "isp and web hosting company".
All our Dedicated Servers have 1Gbit connections with a dedicated 1GigE uplink.
I'd also guess that many of the seeds on any torrent (on a private tracker) are going to also be coming from seedboxes. That might explain why it's so fast too, there is tons of bandwidth between the datacenters themselves. I'm definitely throttled at 100MB/s regardless of how many torrents I've got running (1 or 100), but if they're running 50-100+ instances along with dedicated servers they must have tbps of bandwidth.
So long story medium, unless you can install your home server into a datacenter with a multi terrabit link to the backbone, it will be tough to replicate