If I pay for 50 megabytes of symmetrical internet, what should my download speed be?

At the moment I have a 50 megs symmetrical unlimited internet plan, but no matter the device or connection method (5G, LAN) my download/upload speed never exceeds 5 megabytes even though the speed tests always show 50/50.

Is it possible that my ISP is limiting this speed per device so that a single device does not hold all the bandwidth?

And what does this have to do with piracy? Well, between downloading files at 5mbs vs 50mbs there is a lot of difference, especially a lot of torrents.