Re: Laws of physics aren't suspended for F1...
"Presuming the cars are tracked via GPS the car has to get its position"
You'd like to think that. I paid the more reasonable cost for the app last year and quickly concluded that the car position was probably being guessed ("interpolated" if you want to be generous) from just the three detection points they have around each circuit (at the end of each "sector"). The app was garbage that frequently showed up nonsensical information. It was marginally useful in seeing how non-front-running cars were doing, and during the ad breaks, but the bad experience made mine an easy decision when they drastically upped the price for this year. Now I'm feeling smug about this story.
Back to the GPS concept: if the cars do have GPS, and it would be so easy, cheap and useful that they probably do, then the telemetry is going to the teams, not to the F1 organisers. The teams get the timing data from the organisers and not the other way around.