Most of the speedtesters use far too small a test file to give a valid result. Some report peak speed too rather than average. The only way to reliably find what your connection can do is to either do concurrent downloads from several sources or use a downloader and source that support multiple connections. Obviously the sources need to be capable of delivering at faster than you can download.
FWIW Speedtest.net Coventry gives me results in line with the 60Mbps package speed most of the time.
Edited by kwikbreaks (Thu 21-Feb-13 16:28:16)