It's yet again all a big Telecom/Xtra hoax or con trick. In going from Adventure to Go Large, my international speed has also dropped like others has, from below dial up speed, eg 38Kbps up to the best of about 450Kbps, but most generally around 2 to 4 x dial up speed.
http://www.speakeasy.net/speedtest/
Youtube has gone down the tubes, and if I try to download a pre-recorded music program of around 50MB it trickles in at about 6-11 KBytes/sec, just like dial used to be.