Yup Diamond has helped me on several occasions. One of them was trucking a table to South Dakota for TAR 1 at no charge. They had no clue it was even going to work out but they took a shot because they thought it would be good for pool. I like to think they were right. 
I have yet to meet anyone who works for Brunswick directly at any pool tournament I attended or worked in the last decade or so. 
So yes I have a bias. 
I understand your point about viewing things from a strictly business POV. I am just very glad there is a company who tries to create events and keep bigger events alive  instead of just worrying about how to sell more imported tables. You called Diamond a "fad". I think they deserve a little more respect than that. 
All this talk of Brunswick made me go mosey around their website.  I was actually shocked. I guess the GC V must be twice as good as a Diamond. Maybe its the shipping cost from China that makes it so pricey.
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<-----doing his best to get us to 200 posts