First, I qualify to respond as I am not offended.
Being that she is the goddess of learning, I didn't anticipate any negativity.
Yeh, it may all be twaddle. I am finding this one less evocative than more than a a year of listening to people recommend Sutliff's vinegar aromatic as a pliable alternative for those who want to know what a McClellands is like.
It's kinda hard getting passionate about some guys who can't taste well enough to see a difference between a tiny pipe and a gigantic pipe... as outrageous as that seems to me.
Things that seem as though they should be self-evident... but, no one should be telling anyone what tobacco to put in what kinda pipe. That would irk me as well.
But, it should make sense to everyone that a small bowl would produce a different size and dynamic smoke than a great big wide one. But, it also makes sense to me that if someone's idea of a full range of pipes is merely .75" to .85", then yeh... probably no difference.
Now cones to U-shaped bowls... once again, the size of the top of the chamber is going to make whether a cone or U-shape can be detected as well. I'm not sure if at the .75-.85 range whether one or the other shape is going to matter.
But,
I would encourage people try get a larger range. It adds more interest to the hobby in my opinion.