No. The pipes and fittings that failed were not PEX or other non-metallic materials. My experience with those bursting were way before PEX was commonly used in home plumbing. As I guestimate the dates from my life's timeline, it was some period in the 1970s when there was an extended period where the temps were in the teens (F) or below. And it wasn't my neighbor. It happened in dozens of homes of strangers in the area where I used to work, and for which, I had first hand knowledge by being one of the first on scene.