excellent "response time" to the question and thanks very much! a very good answer to the question. i'm not sure that i would cut the time in half however, since the upstream and downstream can be rather different, though i don't know how you would measure the difference. and yes, i believe that many other things can affect your response time test. packet and/or transaction size, upstream vs. downstream pipe, data manipulation (if any), etc. all things considered, i think this is an excellent addition to the status report. good luck with the further development.
p.s.: many thanks for this web site in general. it is indeed one of the best test sites (if not the best) available. i have found it's accuracy and consistency to be far above the others and i greatly appreciate your efforts.