Ok, well if you’re desperately interested….. :-)

Plot I did running to the london server, one shaped at 99% downstream, the other at 98%…. and I’ve decided to stick at 98% as a result - plot is a little bit hard to distinguish but I’d say there’s around 8ms avg less latency-ish between the two.  And an order of magnitude between using london v fremont :-)

The upstream barely registers

# tc -s qdisc show dev ifb4eth0