Oh, yes I know who the Brown's are.
I will have to disagree with you on the thinking that what one racer prefers means it's better for all people. This comes down to personal preference, there's not a right and wrong. I race dirt bikes and you could ask 10 racers what bike they like or what traits they like in a bike and you'll get 10 different answers. Because people have different riding styles and ride at different speeds and value different traits and feelings from a machine. I would bet that Zach and David have different setups to their race sleds. Also what these top level snowmobilers racers like really doesn't apply to trail riders.. both in the terrain and speed/intensity. What they do is worlds apart from a trail rider. Totally different. But even if it was the same, like I said there's still no right and wrong, it's personal preference. If he likes the color purple that doesn't mean purple is the best color for everyone.
But back to the original point. Cat does offer a 129" again in the catalyst so they must know there is a difference with the lengths and pros and cons for each one might appeal to different buyers.