Curtis Villamizar's Feb 97 NANOG talk has some relevant and interesting
info. See http://www.academ.com/nanog/feb1997/TCP-LOSS.html
<lots of speculation about packet sizes and mtus and the occasional
bash at pmtud and microsfot thrown in for good measure>
To paraphrase a well-known quote, those who do not study history are
condemned to re-invent it.