Oh god, I hope not. RTT has never been an accurate predictor of end-to-end
performance. (Just ask anyone who bought into ping-based global server load
balancing.) ASPATH length is almost as bad (as a predictor) as RTT.
well, it's the way icmp_echo is handeld in some vendor routers and
sometime also the poor implementation of an IP stack on the echoing
device which is a problem.
no, that is not the problem. oh i admit that ping time jitter is ~random.
but even if it weren't, RTT doesn't drive performance, (bw*delay)-loss does.