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I recently had the pleasure of meeting and chatting at length with a Tesla engineer. He indicated that the car is not traction limited on a good road surface. The car will launch at a consistent .8 Gs and did the 3.86 time with traction control on. They were still refining the firmware to optimize it for the new transmission. He felt that they would reach 3.74 with traction control off. This is due to the fact that the traction control is set up to be somewhat conservative.
He also said the optimum shift point is 52 mph and expected 1/4 mile times are mid to high 12s. These performance numbers are pretty much set by battery pack limits. To beat this by any amount a full or partial sport battery pack will be needed. A sport pack would consist of higher discharge rate, lower energy density cells resulting in greater performance and shorter range.
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