Cross-talk, is basically interference from other circuits that are in the same distribution cable as you, from the green street cabinets through to where your own circuit 'drops off' to your house.
If you were customer 1 to go 'live' on FTTC broadband, then you would not suffer CT, as soon as customer 2 goes 'live', CT is introduced. It all depends on where in the distribution cable your circuit lies, and how many other circuits around you are also on FTTC, as to how much CT will affect your circuits performance.
There are other factors too, but to keep it in laymans terms, there's nothing you can do about it I'm afraid - it is what it is.
The only thing you can affect change on and maximise your speed/stability etc ... is the internal wiring set up within your premises. Too deep to go into as I simply haven't time to explain, but there's loads of people on here that can help, and/or start searching for ... 'star-wiring effects on broadband' ... 'bridged tap effects on broadband' ... got to go, but I'm sure someone will find the Kitz link that will assist you ??
Cheers.