Torrent does not cut the speed, torrent just shows you the speed in other units. :) Providers measure speed in mega bits ah. Torrents show the speed in mega bytes ah. 1 byte = 8bit. And your 10 megabits will be the maximum speed of 1.25 megabytes / sec. But since torrents do not show super-duper accurate speed, but rather approximate accuracy, then you need your 1-1.5 megabytes per second. So it's okay.
Torrent is not one big server with everything from where you can download games / movies / porn / books, etc. It is a communication protocol that takes pieces of data from the sending computers and sends them to you. And 2 factors affect the download speed here: