ACD IS based on Amazon's S3 offering. Been using it along with Google Apps for Work Unlimited ($10/month/user) and I hit 150-160Mbps (Mbit), in both directions, from both providers, at any time of any day and I have Verizon FiOS 150/150. I should point out though that I always see 150-160Mbps 100% of the time downloading torrents, over sftp, ftp, ftpes, https, ssh, and https direct downloads from just about any provider, unless they're on a congested network or it's a Kimsufi for example, which you're only gonna get 100Mbps from at the most.
For anyone thinking that Amazon throttles speeds, either download or upload, and/or thinks that Amazon employees look through anyone's cloud drive unless they call and specifically give permission. See a reply I got from their support team just a few weeks ago:
I understand that you're concerned about the security of your files on Amazon Drive. Please keep in mind that your personal information is subject to the protections of our Privacy Notice, which you can find at:
In addition, each file is stored within Amazon Simple Storage Service (S3); the same highly scalable, reliable, fast, data storage infrastructure that Amazon uses to run its own global network of web sites. You can find more info about S3 here: http://docs.aws.amazon.com/AmazonS3/latest/dev/Welcome.html
Your Amazon Drive can only be accessed by you, or anyone you give your Amazon.com account information to. There is no known way that viruses and spyware can access your files while in Amazon Drive.
I was also able to confirm that Amazon doesn't throttle upload speeds but there are a lot of variables outside of our network that may affect upload speeds.
I hope this helps! We look forward to seeing you again soon.
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