I'm seriously doubting that 0.4 seconds better than 11.3 can be done simply with vehicle configuration. The biggest possible weight reduction would be having the car race without a driver. Which would have sounded completely ridiculous if it wasn't a Tesla. But I don't see the car being 20% faster to 155 while only being .5 seconds quicker than insane mode in the quarter. Unless 20% baseline is 85D.
edit - no I'm wrong baseline says "standard Model S Performance". That still leaves P85 vs P85D though.
Pretty sure the 'standard Model S perf' is now considered a P85D - there is no such thing as a P85 if you are buying a new Tesla