I've got DS2500's in my old v6 and they're absolutely ferocious.
I have regular Ferodo Premium (as sold in Halfords - inherited with the car) in my '45 and they're pretty formidabile too, if ultimately more fade-prone.
Both do take a moment to "think about it" when you apply them from cold at low speeds (i.e. if you just move off from a car park and run it up to the barrier...
I really wouldn't say that Ferodo are no good at low speed... only when they're stone cold and until you pressed the pedal twice. If you get to the end of your road, drive along and then brake for the next roundabout, that's them up to temperature.
Once they're warmed up they also stay warmed up, even in rain, ice and snow or after 2 hours on the motorway. Pads always lightly skim the surface of the disc so they get up to temperature even if you don't touch them.
What discs have you got? Standard ones should be fine with Ferodo pads.. but if you have aftermarket jobbies they may be harder or designed to work with harder/more metallic pads. If you're getting a lot of brake dust then that would point that way too, since Freddie's pads are not particularly dusty normally.