You might want to do a testdrive yourself..
That video is a fluke. In (instrumented) test after test, the M5 is over 1 second faster 0-60, and more than 2 seconds faster down the quarter mile. That might not sound like a lot, but imagine a car drives by at 100+ MPH, now count...
one-thousand-one
one-thousand-two
How far down the road is that car now? That's the distance between an M5 and a 85P+ in the quarter mile.
There is a realm of performance at the very top end where the dino-powered engine still has an advantage. Electrics can achieve the same performance, but you're fighting an up-hill battle to get there. You have to make too many compromises along the way [1] in order to beat them. Right now, at least. It'll be slow coming, but I believe the transition to electric advantage is coming.
1: Here's an example of an extremely compromised all-out electric that is capable of beating its petrol powered equivalent. Have a look at 3:35 ish for a drag race. https://www.youtube.com/watch?v=5gFGX43vubM.
this isn't up for debate, it's a factual statement. the german cars are lighter and produce more power. they also cost a lot more, because winning is expensive.
the p85+ is 300 pounds heavier and produces 150hp LESS horsepower and torque than either of those cars. do the math.
the new m5 and e63 are rip-your-face-off-fast. they run 11 second quarter miles with subpar traction. mb and bmw see tesla coming and they know the only thing that keeps them at the top of the game is pure, unadulterated horsepower so that's what sets them apart at the top end.
having said all that, teslas have nicer interiors and that really big touch screen is pretty cool. all the ui software in german cars basically sucks.