TCP Optimizer - Latency

clipped from www.speedguide.net

This tool can be used to effectively estimate the maximum anticipated latency
for BDP/RWIN calculations. In order to do that, we recommend using a larger
number of hosts than the default 5, and a larger packet size (since larger
packets tend to have a bit higher latency). Then, as an estimate of your maximum
anticipated latency, rather than using the Maximum RTT, use the average RTT,
multiplied by two.