[Signalman]

What is the top possible speed?
Somewhere around 16 megabytes per second. According to Skip Folden, a former IBM program manager and independent analyst, 22.7 megabytes per second is beyond unlikely under the circumstances–unless you’re downloading the files directly using a storage device like a USB drive.

https://www.redflagnews.com/headlines-2017/bombshell-nsa-experts-say-dnc-hack-was-actually-a-leak-and-an-inside-job

[Mariner]

I have seen modern HP, Dell and Cisco servers transfer twice that rate.

Dozens of times.