thats not really true, i mean it depends on how you drive, i have had sprung and unsprung and if you feather the throttle on both they both have semi harsh engaugements, the unspring is slightly more rough however feathering the throttle with the engaugment is the trick.
it depending seems like you were choosing a clutch that is underrated for your application, i ALWAYS go with a overrated clutch kit, say my goal is 350whp go for a clutch that can handle 550whp. its like anything else if you want more power its there and can handle it, but not the case in a underated clutch kit