I've also tested a different scenario this time. I started a download in a different server with 100MB/s(1 Gbps) speed and
i ran the script in my original server. Guess what all 16 IPs came out slow:) This means that this throttle is per Workspace.
Once i stopped the download in the other server, some IPs came out fast btw.
I think we need an explanation from Google at this point.