Not true, DS2500 are a high performance road/track pad. DS3000 are a track only pad, and I believe whist offering excellent track performance have corrosive brake dust - I have a mail from Ferrodo to this effect.
Yes FERODO DS 3000 were available back end of last year and are aimed for track use I believe its because they work under higher temps than the DS 2500. They still make the DS 2500 and I would still use them . On the basis that you want to stop at the end of your road when you get the car cold out of the garage!