Website: tester.netia.pl Filters: English, Spyware, Adblock Polska, Fanboy's Annoyances, EasyPrivacy, User Filter. Adguard for Windows 5.10.1167.5997
Tested on Google Chrome 38.0.2125.104 m (64-bit, Stable, incognito)
Yes Steve Speedtest.net is good, the problem you have though is that ISP's can be funny. I remember when i complained to virginmedia about slow speeds and i was testing on speedtest.net their response was "thats inaccurate you need to do it the way we say" besides its another thing that can be added to the whitelist.
While blocked the colorful circle spins endlessly.
I know speedtest.net