With Three 4G at the moment (peak time congestion), there's again a drastic difference between what Ookla Speedtest and others are reporting, including actual transfers.
Heanet (Higher Education Authority network) is what many network technicians recommend testing against here in Ireland as they are a major open mirror of Linux distros and various other open source applications:
The above works out about 6.5Mbps. M-Lab returned a little better:
Netflix's fast.com runs its test multi-threaded, which squeezes extra throughput over the congested 4G connection. So the following is what can be achieved with a multi-part download manager on this connection:
Finally Ookla's Speedtest.net. Sure, if I want a test result to brag about...