The thing about those things is that it is incredible how 99.9% can be
grouped into groups with the exact same number. Like using Winfax to send
out 2000 faxes at a time, over more than an entire weekend. It logs all
connections and when they are sorted by connection speed, eg 9600 baud,
28800, 33600, whatever fax data modems do out of literally 800 calls at
the same speed, or a feww hundred, or 50, or whatever, the call (about a
minute) takes EXACTLY the same time, to the second, with literally a few
exceptions, out of thousands. So having a USR means nothing, a GVC is
EXACTLY the same speed, every time.