This is what makes case studies about product success so difficult. With so many factors involved, any bold proclamation like "Price before product" is bound to have enough prominent counterexamples to render it useless in application.
Studies like this always remind me of Jim Collins' "Good to Great" controversy where several of the heralded companies went bankrupt a few years after the book was published.
Setting a good price before releasing a product is a lot easier said than done. Particularly for startup products which may not have great reference points. People are also generally not that good at figuring out what they're willing to pay for something.
I take "Price before product" as simply a catchy reminder to "think about price" as part of the long list of product requirements.