According to the theories going round regarding weight the Viper wouldn't sell a single boat because it is too heavy.
The opposite is true so I don't think the weight rules have any impact on customer behavior.
For the added weight you get a stiff boat with lots of volume which I think has proven is more important then weight.

What I think could happen is a small "arms race" amongst manufacturers trying to bring the weight down, something that I think is good for consumers in the end.