I actually didn't know that myself! I just had a look at the router for that machine:
This it does go up and down slightly but not much. Once in a while it barely spikes when it updates the price feed as well.
It certainly doesn't effect my internet speed or reach my monthly bandwidth limits.
I have some HP servers that I am getting ready to shutter and I wish that I could set one up as a node at some point
I'm sure you could. If you are using SSDs, I might recommend running a couple in RAID 0 to get the extra speed. Rishi was worried that SSDs are starting to not keep up. But I am not completely convinced of that theory. But since they are relatively cheap it wouldn't hurt to stripe them anyway.
I know SSD's have limits on read/writes, but it still seems like they would be able to keep up better than a traditional drive. The speeds are just so much better. It's really only recently that they even offer them in servers for RAID Arrays, so I guess we are all still learning just how effective they can be. Those numbers don't look too bad, but I think it would probably be a conflict of interest for me to spin one up at work!