I am having the same problem. If I pause and resume the download, it goes full speed for a short period and then goes back to around 500 KB/s. I am expecting much more than that on my 100mbit line. Here's my ping:
Pinging files.nexus-cdn.com [185.152.65.129] with 32 bytes of data:
Reply from 185.152.65.129: bytes=32 time=22ms TTL=55
Reply from 185.152.65.129: bytes=32 time=22ms TTL=55
Reply from 185.152.65.129: bytes=32 time=22ms TTL=55
Reply from 185.152.65.129: bytes=32 time=22ms TTL=55
Ping statistics for 185.152.65.129:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 22ms, Maximum = 22ms, Average = 22ms... and on premium files CDN:
Pinging premium-files.nexus-cdn.com [195.181.173.81] with 32 bytes of data:
Request timed out.
Reply from 195.181.173.81: bytes=32 time=20ms TTL=56
Request timed out.
Reply from 195.181.173.81: bytes=32 time=20ms TTL=56
Ping statistics for 195.181.173.81:
Packets: Sent = 4, Received = 2, Lost = 2 (50% loss),
Approximate round trip times in milli-seconds:
Minimum = 20ms, Maximum = 20ms, Average = 20ms