One point that may have skewed your data, Yinzer. I realize you did this for fun, just like your for-sale ad...but like that ad, I expect you also did it with a purpose.
Owners tend to be as interested in unofficial threads featuring the color car they own as well as threads featuring their favorite unicorn color. Plenty of Berlina owners would swap for imola or GPW and might be active on those threads. But BB owners have a Berlina because the color was more readily available in more configurations when they were looking, and color was a secondary factor in their choice. Same goes for the reds. I don't think the views vs. replies analysis necessarily controlled for this.
Still, loved the work and the presentation.