If we assume the worst Carrera in the best conditions then they would pair a base 911 C4 (heaviest) with a manual gear box (slowest) with a good driver on a good surface. These will do mid 12's on a prepped track with rollout subtracted.
The track looks legit. The times look legit in the video. The thing is the EV doesn't have shifting, and it makes all the torque instantly down low with its gearing, so it has all the advantage besides its weight. Add in a single axel aluminum trailer that is about 1000lbs (
Source) and a 3,400lb Carrera, so say add 4,500lbs to a 6,800lb truck, and the total is 11k-12k pounds.
Interestingly, if we put into a 1/4 mile calculator the weight of a Tesla Plaid and its horsepower we get a low to mid 9 second quarter mile, which is what it does. If we put in the same horsepower and the 6,800lb Cybertruck then we get a high 10 second quarter mile, which it does. If we put in 11,000 pounds, we get something in the 12's, which beats the base Carrera, which is what it does, so everything seems reasonable to me.
The horsepower is less and torque is much more on the Cybertruck than the Plaid because of gearing, but it has a bigger battery at 125kWh'ish, so this seems entirely plausible to me. The quoted 845hp and 10,300tq (wheel torque) seems like numbers that reflect a shift in gearing, but the motors are likely similar to the 1020hp and 1050tq Model S Plaid with different gearing and a bigger battery, so overall, more power potential, so I don't doubt the numbers.
The Rivian has 835hp and 908tq, and Jason says it is 60lbs heavier than the Cybertruck, but the quoted weight difference from the manufactures is 250lbs, so I don't know if he did a real world weight, or if he messed up there. The 250lbs could justify the performance difference along with some differences in torque perhaps, but I feel like the capabilities of the truck is underrated or intentionally limited by the computers. We typically don't see the Plaid putting down the same times in the quarter mile after multiple attempts, as the battery is getting low, so it is possible the new 4680 cells and any extra cooling is doing better, or maybe the extra battery capacity is helping, or maybe they limited the performance in some way. Hard to know.