You don't think most of us have tried different tips? 30 years ago, all of this tip nonsense was irrelevant because everyone either played Le Pro/Triangle if they liked a firmer tip, and Elk Master if they liked a softer tip. Now the tip has become this expensive accessory that has to be finely tuned to your skill level/stroke/whatever or you'll suck. It's never mattered that much, and it still doesn't matter that much.
Actually 30 years ago there were still a lot of brands of tips only they weren't layered tips. People used to swear by Chandivert tips, a true French tip made in France.
I also used to think that tips don't matter much. I am also a shitty player despite having had a few moments of brilliance that made me think I am a much better player than I actually am.
I sold layered tips for a couple years in 2000-2002. During that time I bought a durometer and did a bunch of tests with 6oz hammers to try to understand the dynamics. My conclusion was then that most tips would reach about the same hardness after so many hits.
But the fact is that hardness alone doesn't tell the whole tale. For example what's the difference between a layered tip at 75 and a single layer tip at 75? I don't know because that would require more research but I can tell you that those two tips don't feel the same and the difference is noticeable.
The equipment does make a difference and if anyone wants to bet HIGH and let me choose the cue and tip and chalk they use I am willing to test out my statement by betting a $1000. How much of a difference matters more as the player gets better in the sense that they are much more in touch with the feel side of pool than amateurs are.
However if you put five tips of different hardnesses on five nearly identical shafts it's unlikely that any professional could accurately identify the hardness of each tip with consistency. Nor could any amateur.
So Darren's statement is of course an opinion based on his personal experience and observation but much less rooted in established research. Talking out of his ass though is a bit strong because as much as we amateurs love to believe that we could be top players if only......the fact is that we aren't and our mortgage doesn't depend on being able to precisely move the cue ball consistently.
I spent some time with Jose Parica and he was trying to teach me how to feather a ball. He would demonstrate and I would butcher it, over and over, finally in exasperation I said to Jose, "I understand what you are saying, I see you doing it, but I can't do it." However I did absorb the information and kept practicing and now years later I can feather a ball much better and don't butcher it every time.