TMNet currently upgrading all dslam speed to 1-3Mb. I not sure why, but it much easier for them to manage the speed based on username. Even with speed capped at 1-3Mb, there are still another capping at BRAS. So still you getting the same speed you subscribed.

So why complain if you modem speed show even 8mb but you subcribe to 512 and geting 50+KB? Unless you get <80% you the speed, then start complaining.