Mine went through a HUGE amount of stress during the quake and they never showed any signed of problems whatsoever. In fact, they never looked better, even after swimming in cold mud!
I really don't find them any more sensitive than other fish. I don't baby them at all, I freely chuck them from tank to tank and do massive water changes and never have any problems. I figure that as with anything, if they live a protected life, they will find any sudden change traumatic. Works for me anyway.