It really is, for all AWS-AWS traffic barring Beijing and Ningxia. src: I worked in AWS networking for 2.5 years
here's DUB->SYD:
HOST: amazon02.ring.nlnog.net Loss% Snt Last Avg Best Wrst StDev
1. AS16509 ec2-3-248-240-73.eu 0.0% 10 7.1 22.8 1.0 125.7 38.1
2. AS??? ??? 100.0 10 0.0 0.0 0.0 0.0 0.0
3. AS??? ??? 100.0 10 0.0 0.0 0.0 0.0 0.0
4. AS??? ??? 100.0 10 0.0 0.0 0.0 0.0 0.0
5. AS??? ??? 100.0 10 0.0 0.0 0.0 0.0 0.0
6. AS??? ??? 100.0 10 0.0 0.0 0.0 0.0 0.0
7. AS??? 100.65.15.3 0.0% 10 0.8 1.1 0.2 6.7 2.0
8. AS??? 100.95.19.145 0.0% 10 0.3 1.4 0.2 5.5 1.9
9. AS??? 100.100.4.12 0.0% 10 0.3 1.1 0.3 7.0 2.1
10. AS??? 150.222.242.237 0.0% 10 254.0 254.0 253.9 254.4 0.2
11. AS??? 52.95.36.164 0.0% 10 257.2 255.7 254.0 257.3 1.3
12. AS??? 150.222.112.139 0.0% 10 253.4 253.9 253.4 255.1 0.5
13. AS??? 150.222.112.142 0.0% 10 259.6 257.8 255.5 266.8 3.5
14. AS??? 52.95.36.143 0.0% 10 255.3 256.1 255.2 261.4 1.9
15. AS??? 52.95.38.17 0.0% 10 255.0 255.6 254.9 259.9 1.6
16. AS??? ??? 100.0 10 0.0 0.0 0.0 0.0 0.0
17. AS??? ??? 100.0 10 0.0 0.0 0.0 0.0 0.0
18. AS??? ??? 100.0 10 0.0 0.0 0.0 0.0 0.0
19. AS??? ??? 100.0 10 0.0 0.0 0.0 0.0 0.0
20. AS??? ??? 100.0 10 0.0 0.0 0.0 0.0 0.0
21. AS??? 100.65.16.65 0.0% 10 256.7 279.8 256.7 334.4 26.1
22. AS16509 amazon08.ring.nlnog 0.0% 10 254.4 254.4 254.3 254.4 0.0