Well guys let's put it into perspective.
4.2 is 'quick' but it's not really fast. Let me explain.
The manufacturers are still addressing 0-60 times because that's what people know. Unfortunately it doesn't mean much in the real world. A GT350 does 0-60 SLOWER than a golf R, but at the end of 400m it gets there about a second quicker and is traveling 10mph faster.
This isn't a fair comparison but it illustrates my point.
Cars can do 4 second sprints these days because they're engineered to excel at certain parameters. I had a turbo D-series civic I built. It did 0-60 in probably 5.5+ but I managed a 13.7@103. Not too far behind the golf R, especially the manual model (apples and such).
"The most merciful thing in the world, I think, is the inability of the human mind to correlate all its contents... some day the piecing together of dissociated knowledge will open up such terrifying vistas of reality, and of our frightful position therein, that we shall either go mad from the revelation or flee from the light into the peace and safety of a new Dark Age."
-H.P. Lovecraft