For Most speedtest.net is the usual site to verify ISP/Telco speed. how accurate is it I’m not sure .but I’m sure of one thing . when you are running a speedtest you run it against your provider ! so in this case you measure the speed to your provider network ! not the external internet speed ! .
what is the catch . some providers give speedtest ( the local hosted one ) more priority so when you perform a test you will always get higher speed ! . but when trying to browse the internet you will feel it slow .
some providers throttle Torrent and other kind of apps which we can speak about later .
there is a new site that measure the speed and experience in different way which personally I like . they don’t download a file or do ping only . they perform multiple tests such as running youtube in different quality ( SD,HD) . in addition they started to give ranking to providers in Kuwait for example
they are not the best but they are very cool . try them and tell me what do you think 🙂 . link below
also they have iPhone,andrio app