Flap, it's not necessary to take the blame. I don't think anyone here is trying to do anything but figure out what happened.

I just took a random CA hinge out of my parts box, and tried to tear it apart. No way. So I picked up two pairs of plyers, and tried again. No way could I tear that hinge. It stretched a little, but it wouldn't tear, and I'm a lot stronger than a servo. Try it yourself. So, if they didn't pull out of the wood, something catastrophic happened that 5 hinges would tear at the hinge line.

Since you were building a 4*, we can probably assume they were Sig hinges. Did they have a score on them, such as Don Davis was talking about when he started this thread? I haven't used SIG hinges in a while, but it sounds like they now have a slit on them that wicks CA into the wood. Is it possible you installed them with the slit parallel to the trailing edge?

Another possibility is that something (nitro or CA or ?) attacked the hinge and weakened it. I'm going to soak my test hinge in thin CA, let it dry, and then repeat the test.

I think we're better off if we apply some science, and figure this out rather than blindly scare folks away from CA hinges. I've used other hinges, and CA hinges are about 100 times easier to install on small airplanes.