I have never understood why their ratings and surveys carry any credibility whatsoever.
If you go to JD Power’s website, you can see the results by general category. I will admit that I would like to see the data points themselves as opposed to the ‘scale-of-dots’ summary, but all categories are top for both Buick and Lexus. Cadillac and others are missing a single dot in some groups.
As does Consumer Reports - who lets the owners define what a serious problem is, and who does no fact checking on the response. In other words, you could decide a broken stereo knob is a serious problem, and no one would ever check that response.
To make things worse, they (CR) do give instructions not to count any problem covered by recall... Which makes Honda Odyssey transmissions suddenly “reliable”? Yeah, right...