I'd hate to cause someone to lose a lucrative job, but why can you not get used to the 'hit' of any of those shafts? If I am convinced something helps my game, I learn to use it. We are humans. You don't have to be a Marine to adapt and overcome.
I have to agree with you. I just watched a video on YouTube where our own DrDave was measuring the squirt of different tip material / height combinations. For comparison, he included an example with a Predator Z2. The average difference in squirt between the LD and regular shafts used for the remainder of the tests was around 3/4" over a length of the table shot with a 9/16" tip offset.
I played with a Predator shaft for a lot of years. Their marketing claims they reduce squirt by 40% as compared to a regular shaft. Did I play better with their product? Maybe, maybe not. 40% better? No way. That tells me that squirt isn't the only variable in the equation when shooting with english.
I have a tape at home where they ask Nick Varner about squirt. He says "You can play awfully good pool without knowing anything about it. If you over cut a ball, aim it thicker next time."
I like that philosophy.