First of all, street racing is not recommended in any fashion.
On the positive side, in this case, it doesn’t look to me like the drivers here don’t surpass the speed limit while testing their acceleration against one another. They step on their respective pedals for a few seconds but then slow down and go about their normal business.
Also note that this video is quite crappy. The person recording wasn’t really set up to record a race, and he didn’t do us the favor of clipping the boring first minute cruising and then sitting at the traffic light. Jump to 1 minute in to skip all of that.
Anyway, though, if you’re tired of seeing insane Teslas crush supercars off the line (like this, for example), and have been eager to see a Model S race a Model S, this is a video for you. It’s unclear which types of Model S these are, but one is clearly a level above the other. Have a watch: