We have the same types of conversations on my car forums about when they don't bring certain models, engines, accessories, etc to the US and the answer remains the same; us enthusiast would LOVE it but we don't represent a random sampling of the general public. I'm willing to bet that if you ask a stranger about a Weber charcoal grill, their mind would go right to a black grill. They have a recognizable product that most likely acts as a cash cow. They probably see no need to bring different colors to the US. In other countries, where Weber isn't as established, the colors may be drawing attention and creating awareness.
Just my $0.02 cents.
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