Peak G is normally driving in 300' circle left and right and averaging the two peak sustained values. It is not transitional or balance.
With an experienced National champ at the wheel of a Prime, I bested his best time in a Volt during AutoX sessions by over 1 second. I'm an intermediate level driver. The hotshoe was training a journalist who showed up in a Prime. My 16 year old son beat the journalist's time by quite a bit shortly after my son got his driver's license.