Depends if you class lifting off the brake and moving to the accelerator as heel toe. If there's a risk of rolling back then I'll use the handbrake. I don't particularly like it when people roll back towards me so I don't do it ether.
Do you mean lifting off of the brake and engaging the throttle at the same time with the same foot? If so, I find that very impressive - It must be incredibility difficult to apply the correct amount of throttle with the limited movement available with the "heel"?