It's not so much how much torque, as how fast it comes on. As a Dentist, I can tell you that an electric motor achieves (and maintains) full torque almost instantly. It's either on or it's not.
Coming out of corners this would have to contribute significantly to time.
The Tesla in the Topgear episode (and it's always in top gear, single speed) had tires designed for low rolling resistance, not grip. The recharge times on Topgear were for a lower voltage recharge I think.
This is all early development. It is just a matter of time until electrics show up on track and change things for good. Lighter batteries with more range, faster recharges, reliable transmissions and we're in a new league.
The Japanese have made a car with separate motors for each wheel that is astonishingly fast. Can't remember the name.
Anyone can make something complicated. It takes genius to make it simple. Einstein.
2011 Evora S
Racing Heritage Edition (#3 of 4) (Now with alexsharkeyross)
2005 Elise LRG, track prepped
1974 Lotus Europa Special
3841R in JPS
2007 Toyota Tundra (about 10 cup holders), traded for 2015 Tundra TRD PRO
2007 Audi S4 DTM (RIP) 1980 Rover SD1 (new home) 2015 Honda Civic Si
2016 370Z Nismo
2013 Bentley Continental GT Speed 2019 Lexus LC500