I think all boards will break. If the same board is breaking in the same spot by different people, then yeah manufacturer issue.
I remember in the past the Mervin boards had a reputation for delamming. I have heard as many complaints about that recently. Its also about your own experience with gear. Everyone always complained about the union capstrap sticking but I never had a problem. Doesn't mean all those other complaints weren't valid though. There was a lot of them.