I have seen it happen in person with GP and Dubro's. I bought a few different brands years ago, and made up some samples to test there strength to destruction. The only ones that I could not get to delaminate or break were the Sig easy hinges and the Radio South blue hinges. I did not like the out come of the Dubro and Greap planes products.
Now, All I use is Radio South, and have never ever broke one or pulled it out.
I had to use a 6" vise grips to destroy the Radio South hinge.