The whole notion of trying to determine how much one 'asks' a clutch to slip on takeoff or upshift/downshift is exceedingly difficult to do via text exchange, such as in a forum.
I have a friend who claims he never slips the clutch, yet not only can I hear it and smell it when I ride with him, but over the years he invariably replaces clutches on his machines easily inside of 25k miles. He takes ages to fully engage the clutch on takeoff (lots of revs!), and routinely downshifts without a rev matching throttle blip 'asking' the clutch disk to do all of the speed matching among the drivetrain components while he rides the clutch pedal. He thinks of himself as a competent manual gearbox operator, having driven them all his driving life, but is in fact incredibly insensitive to machinery.
I went from replacing clutch disks at least annually in my early muscle car drag racing days (low experience and abusive style), to getting 150k+ miles out of my track driven street car clutches (lots of experience and expert coaching).
So a long winded way of saying driving style has a huge impact on clutch life, and trying to figure out if the issue is the clutch or the driver is nigh on impossible without direct observation.
