nah enrico's right, its mainly the driver. any chump can put his foot down, but coming to a corner its experience that counts and power that goes oooout the window. the better you can drive, the more you understand about driving techniques etc, the faster u drive, the more seconds you knock off etc.
When does power become boring? how long is a piece of string?
in terms of wanting to go faster and become a better driver, track time is an investment for some and recreation for others, or both.