I don't think it's even quite half a second. The P model 0-60 time of 3.1s is quoted with 1 ft roll-out, while all the other models are not. I think a standard LR AWD 0-60 time with 1ft roll-out is 3.9s, so with boost it would be around 3.4s by the same measurement as used for the P model.
My LR with Boost has a 0-60 time of 3.49s with the rollout. Although Tesla states the equavalent for a P is 3.1s, results posted on Dragy show times around 2.98s, so there is still about 0.5s between LR+boost and P.