Did anyone else have some pretty terrible results from the speed tester? I was pretty optimistic seeing their sample screenshot - am I missing something? http://i.imgur.com/UwNBGf3.png
It says on the page:
"Note: In general, the farther away you are from an Amazon S3 region, the higher the speed improvement you can expect from using Amazon S3 Transfer Acceleration. If you see similar speed results with and without the acceleration, your upload bandwidth or a system constraint might be limiting your speed."
So I suspect you might be having that problem in your test.
We have 20Gbit of Direct Connect with public peering on. This causes upload for us to be 40% slower in primary region and 2-5% slower in the other regions in the US. We only get any benefit going to APAC, granted we aren't your "typical" or "ideal" user for this
Same here, got 11%-24% slower in most regions, and only 3% faster in US-EAST-1. Sao Paulo got 60% faster, though.
Regardless of my results, I've gotta hand it to Amazon on a really kickass speed comparison page. That's a great user experience. It immediately tells me whether I should be using this or not from my particular corporate network without requiring me to waste a day or so trying it out.
So I suspect you might be having that problem in your test.