Definitely reaching there - you can't assume a large majority of people who ordered from Amazon are leaving reviews. You already know that people without a working console will no doubt go leave a review, so the sample is significantly skewed.
We won't know if this is a real problem until Sony says something.
Disclosure: I ordered my PS4 from Amazon in June, received it yesterday, it works fine...and I have no reason to write a review about it.
Also, it looks - at a glance - like more of the 5* reviews are from verified purchasers than the 1* reviews. Presumably a bunch of people who didn't buy from Amazon and had a DOA PS4 went onto Amazon and posted an angry review, but people who got a working one had no reason to.
We won't know if this is a real problem until Sony says something.
Disclosure: I ordered my PS4 from Amazon in June, received it yesterday, it works fine...and I have no reason to write a review about it.