Unfortunately, it's not actually very useful, as whatever server they're using on the other end is severely constrained. networkQuality gives me:

Downlink: 884.856 Mbps, 198 RPM - Uplink: 13.238 Mbps, 198 RPM

whereas speedtest (whether to the official speedtest server OR a friend's home server in their basement!) gives ~700 Mbps uplink.

  networkQuality -s