One good way is downloading a magnet link through LW & seeing what speeds you get + MagnetMix.com +: The Source for Good Content I presume you should be able to get over 100 KB/s normally so if you get less than this ...

If you also already know what speeds you can get via speed tests, this will help you to know also. Choose nearest location for a speed test & only have your browser open: Speed Test Internet Speed Test DSL Speed Test Broadband Speed Test Bandwidth Speed Test. ISP speed tests are usually measured in bits per second (kbps) whereas LW measures them is bytes per second (KB/s). So after doing your speed test, divide it by 8 to give you the equivalent in B/s