Mechanics and shops are trying to blame the cam or lifter manufacturers for a perceived problem that exists only in their particular state of mind.
more people are tending to routinely put stronger valve springs into their engines. Cam dynamics are improving, there is more lift with lesser duration, etc. Faster ramp rates need it, people like it for RPMs sake..... etc.
If somes good, more is better. Right?
Try breaking in the cams with "break-in" valve springs, then installing those heavy duty suckers..... it works much better in the long run. You'll be suprised how your cam failure rate drops to ZERO.