In my experience, the download speed also depends on your company's VPN (if you are using one) and the source of the file.
For example, with my VPN, I achieved 1057 Up/1358 Down.
Without my VPN, I achieved 1012 Up/7685 Down.
Both using
www.speedtest.net via Comcast with power boost.
BTW... I download 100+MB files on a daily basis and rarely note a slow-down.