Your broadband connection speed is a marketing tool for broadband companies to snare people into thinking that eventually one day they will reach the dizzying heights of broadband Nirvana.
Your download speed is the reality, much like beer goggles, you think you got a great thing going, then you wake up in the morning to a different view.
Take Sky for example
Max package 16Mbps then they say (only in certain areas) I sign up, i get 2Mbps. Why? cause i'm a noob that should have known better, but it was cheap.
http://www.bt.com/broadband
This will tell you how much your actual line speed is, then you can get a broadband provider that is close to it.