Both problems Tesla avoids entirely with a single reduction gear and vastly better traction control (you can argue this a bit on the P100D, but the 3 is just floor it and go every time)
....
The LR AWD Model 3 is quicker 30-50 or 50-70 (or 30-70 if you prefer) than supercars that cost $300,000 and easily beat it 0-60... because shifting is slow.
As far as I know it's quicker at either as car mags measure such things that any ICE mass production car in the world
a 20mph band is way too arbitrary and esoteric to be useful. you dont get a full run through of a cars powerband; 30-50 is still traction limited in some cars; and 50-70 is impacted by a shift in the middle.
most occasions ive ever seen 50-70 listed in mags, is locked in top-gear configuration, rather than top-performance. it is mildly useful as it represents a lazy passing scenario (i.e. non-downshift). the numbers for those as part of a top speed run exists, but theres just not a large pool of number to compare to.
BECAUSE of AWD, and the more direct traction control, is why tesla has comparative advantage in 0-60. Due to its power curve, it'd probably do less good at 20-80.....
....but even without getting into what metrics are biased for which vehicles, under the context of a getting a single measurement that represents performance in a relatable manner, 20-80 is the best i can think of.