Anyone familiar with the finer details of telecoms and broadband or fibre? Is the overhead and speed loss (due to distance, quality of cabling etc), a static figure or dynamic based on the service type? If for example you have broadband and sync half the speed that your line is rated at (e.g. 10mb down instead of 20mb down (which would be maximum)), would you experience the same 10mb loss with a faster service that offered 50mb down?; resulting in only 40mb down? Or would it still be roughly 50% loss?