Not only did they upgrade the original tires to track-oriented, barely street legal tires but also they upgraded to track-oriented brakes. Both of these have very large effects on track times. Adjusting handling characteristics to the preferences of the same driver who then sets the lap times is somewhat of a cheat too.
The link to is a blog spam article that makes is it appear as if the Tesla was faster than a current Ferrari model but in reality, it was an 8-year old model. I don't see a lap time for the Ferrari 488 but the Lamborghini Huracan Performante was much faster: 1:18.73 vs 1:21.49 with Randy Probst. The 2018 Nissan GT-R Nismo was also faster. (https://fastestlaps.com/tracks/willow-springs-streets-of-wil...)
The link to is a blog spam article that makes is it appear as if the Tesla was faster than a current Ferrari model but in reality, it was an 8-year old model. I don't see a lap time for the Ferrari 488 but the Lamborghini Huracan Performante was much faster: 1:18.73 vs 1:21.49 with Randy Probst. The 2018 Nissan GT-R Nismo was also faster. (https://fastestlaps.com/tracks/willow-springs-streets-of-wil...)
The biggest problem is not mentioned at all - the Tesla can do only about 4 laps (4-5 estimated here https://www.motortrend.com/cars/alfa-romeo/giulia/2019/tesla... but the track tires limit the range further).