Another way to look at this. The non-performance models are ~0.2 seconds faster than the specs indicate.
Most 0-60 specs subtract the time it takes to travel the first foot. Sometimes this is oddly worded "with rollout" meaning "without the rollout time included."
I suspect the non-performance Teslas include the rollout time to make the delta between them and their performance versions seem larger.
For the MY:
AWD: Real 0-60: 4.8 (spec:4.8)
AB: Real 0-60: 4.2 (spec: 4.2)
Perf: Real 0-60: 3.7 (spec: 3.5)