It seems to me that it is.
I have a j1a 2.5 that I always took perfect care of it.
Never bare skin, never in bad environment, always nikwash, always in the closet when off season, you name it...
Still it got some delamination on the collar, okay not visible, in a folding part, I thought...
then I wore it only a couple of time in the last season, because of good weather, then "okay, I clean it, put in closet".
Nikwash at 40 degrees, then dry to fix the TX waterproof and it came out fully delaminated. After that I said goodbye to GTX products, especially considering that I have older schoeller and Stone Island textiles that are still in perfect condition and fully waterproof.