Just thought i'd throw in my 2 cents on blipping, it's exactly like heal toeing in cages, not really needed for everyday riding but essential if you want to go really fast. Like on a bike, if you fail to heal toe on a downshift with a meaty engine you can fully lock the rear wheels and spin yourself out.
I used to healtoe in everyday driving until my foot slipped off the brake (as you have to have your foot between the brake and gas) and i nearly rear ended someone. Now i just do it if i'm out for a country drive
