I used to work for Porsche and my first experience with a turbo was a 930. Yeah I know, Sweet! Anyway the best way I would explain it was upto 3000 rpm there was not much but when the turbo came on it felt like somebody had their hand behind me and gave me a great big shove and kept on pushing. What a rush and really pissed off that corvette. : )
BTW: Another great rush was when you stood on the brakes and this thing slowed down like you had dropped the chute.
jim