Your point about global failure modes is well-taken. Even still, one could reasonably expect inter-region networking not to be so difficult. As for the instan

Your point about global failure modes is well-taken. Even still, one could reasonably expect inter-region networking not to be so difficult. As for the instances I tested, they were m4 and r4. To get full 10GE out of either, I needed to use m4.10xl and r4.8xl, both roughly around $900 per month. By comparison an n1-standard-8 is about $60/mo and the n1-highcpu-8 is $50/mo. I've tested the former and got something like 15.8 or 15.9gbps using iperf. IMHO, that's pretty significant.