Having a digital radio in the car, you cant really tell the difference between Digital or FM. Digital is slightly better, but not the huge step as implied by everyone. I actually prefer the way that an FM signal drops off in a bad signal area compared to a digital radio, which gives a horrible noise and then goes completely dead.
Also, FM signal strength seems to be stronger than digital (although i'm sure this will change).
Scrolling text, as used by the BBC, is a useless gimmick!