TCP Throughput across the Internet

After reading Brad Hedlund's excellent overview and digging into the great tools at SWITCH, I ran some quick numbers for what transfers might see across the Internet.

First, taking low packet loss of 0.01% and checking across various delays from 5 to 60ms, I get:

Then, using 60 ms as a rather normal round-trip time (RTT) across the Internet, I tried values for packet loss increasing to a very normal 0.1% :

Looks like it's pretty hard to fill that 25Mbps DSL.  In the future, I will look at tuning options for improving that.  Comments welcome!