While the Zyppy article is interesting in that it has statistics about the title rewriting, the Google guide on writing proper titles is more relevant to all of us who maintain websites affected by this. Thanks for linking it.

The ideal article would be something like "Google rewrites your titles in search results because your titles suck."

The Google guide does well to explain why some titles are rewritten, such as having duplicate titles across multiple pages, making it impossible to differentiate between pages that show up in the same set of search results.