These are my two lowest based on sorting by speed:
The left was a test over mobile data before 3G and 4G came to my area over the past month on the Three network.
The right test result is from my previous ISP Bluebox Broadband and I had many uplink test results under 10Kbps. I was paying for a subscription with a 10Mbps uplink! Unsurprisingly, I've since changed provider after they kept insisting my connection was fine and they threatened to charge me for any further service calls that did not involve a complete outage.