Interesting note buried in a article about the ZL1 at the 'Ring...
"To get a read on what the fifth-gen ZL1 could've done better we asked Al Oppenheiser what was first on his unrequited wish-list for the old car. "The biggest thing was that I wanted to include the electronic limited slip differential," he replied. "We knew what capability it gave the Corvette. It was available but the thing we spent money on was electronic power steering."
He says it's the single thing that makes the most difference between the 5th and 6th Gen car.
http://arstechnica.com/cars/2016/11/...burgring-time/