Also the algorithm used by ookla has a tendency to show a good result even when a link is congested
Yes that's interesting. I had a chance to play in the US last month (family over there). They subscribe to Time Warner Cable's highest speed service - 50mbps download, 5mbps upload.
Using a wired connection to their ISP required all in one box (same idea as VM) they achieve 50mbps download and 5mbps upload from the local speed tester (ookla powered) at Time Warner, and using one about 500 miles away from a big competitor Comcast. Almost all the independent testers were pretty awful around 10mbps max!! (I didn't try thinkbroadband, as generally the UK connectivity is slow, I'd anticipate 5mbps on a good day).
Wireless (N with WPA2) was always poor, only 30mbps download, and kept stuttering - inSSIDer showed lots of local networks but all low enough they shouldn't affect it. I think its a really poor wifi unit. The stuttering showed up browsing on phones (Android and/or iPhone) and iPads, and on desktop PC showed in "outlook as lost connection" messages. Annoying.
But that is the max they can get, their entire housing estate (neighborhood) can't get DSL, too far from the CO (exchange) and so Time Warner have a captive market!
James -
be* pro - on THFB - sync about 17.2mbps -
BQM