I'm not sure I'd put a lot of credibility in the reviews on apple.com. Especially for a device like a display adapter which is frequently connected to a finicky and/or cheap device like a projector or display.

Then why so many have 5 stars on Amazon? Are people that buy apple products more likely to connect them to finicky or cheap devices?

No, I think that people who have had bad experiences with their adapter are more likely to go the manufacturer's website and post comments about how it didn't work for them. If Amazon wasn't a wasteland of fake reviews, I might actually trust it more than Apple's website.

So don't trust Amazon because fake reviews, don't trust Apple reviews cause users are dumb and confuse adapter issues with third-party devices issues, I think you just don't trust reviews regardless.