Seems like the Teslas in that video do better than most ICE vehicles: https://www.youtube.com/watch?v=Qmm7AfLMAqY
Interestingly I wonder if it's an issue of just a difference between the two designs in terms of scenarios its optimized for (a.k.a. there's a tradeoff).
If the EV's skateboard battery water seal is functioning perfectly then EV will perform well, perhaps better than a traditional design ICE/EV/PHEV platform.
If the EV's skateboard battery water seal has been compromised, then due to its relatively low placement, a lower than normal water levels may cause significant damages.
Water Damaged Tesla Model S Battery