Yes, that's exactly what I've read across various forums.
I've also gathered that the best movement for a GMT Rolex is the rather prejudiced 21J.
They say it's most reliable with the GMT hand and if it breaks down you just replace it, very cheaply ofcourse.
However I've been thinking of the Asian clone with the wrong hand stack but now I am totally confused.
I guess I'd just spring for one soon as it's not expensive with either of these two movements.