Makes sense.
re: Parking brake - I was just thinking it seems to always be worse on my first start of the car for the day, which would most likely have to do with temperature, although it is intermittent at times. When you all mentioned the brakes and sensors. It got me thinking about the parking brake and how the car may measure brakes on vs. off.
For me i generally start my car, then review the parking brake - if the car measures brake pressure and zeroes/set control when the key is turned to account for pad wear (no idea if that's how it works), might i be using more brake pressure/depth of brake pedal at start, than a typical brake and takeoff - therefor confusing ecu/tcu of when to switch to 'go'.
Flipside of that, by leaving brake pads touching rotors with the parking brake, it is creating dry/sticky spots on the rotor that while not normally noticeable by a driver, it's causing the car some confusion....
i don't know - random thoughts with too much coffee.