Sounds like a peering issue between your isp and aws... Unless other customers and employees are using the same isp... Then it might be your network or machine... Many possibilities
Thanks! I eliminated that it was my machine -- I observed the same phenomenon on two machines.
I launched my own EC2 web instance in us-east-1 and hosted one of the slow files, and repeatedly downloaded it using a `python -m SimpleHTTPServer`. I similarly observed a slow download speed (128Kbps) without my NordVPN connection.
Oddly enough, I also observed a slow download speed to my us-east-1 server WITH my NordVPN connection, so that let me to believe it's a broader issue, however I did observe a fast download speed from an AWS server located in eu-central-1.
I'm generally confused. Connecting to NordVPN eliminates my issue, but the tests I am conducting are providing inconclusive evidence as to why this is the case!