I suppose could possibly be, but somehow doubt it? If I loosen up the handbrake it's exactly the same, except I have to pull it further before anything happens. When I first bought the car the handbrake was really loose, about 8 clicks to full up I think (but wheels still not locking up). Readjusted it to whatever the Gregory's manual says (5-6 clicks? Something like that?), still same. First motorkhana dropped it to 3 clicks, but with that setting couldn't get the rears to lock up at all during the practice so tightened it again as tight as it will go (1 click) and I can lock it up if I throw the car around enough...
But I can try that anyway, see if it will help any...
*edit* I don't think the adjustment on the handbrake will affect the pedal travel, I've got a cable handbrake...