There was a guy in the intro movie who turned instantaneously too.
Some people commented thats weird but assumed it was done for cinematic purposes. Guess not.
Are you sure he "turned instantaneously"? We don't know when he became infected. Perhaps they were all activated at the same time (ceremorphosis triggered as the tadpole was no longer kept in stasis), hence why all the mind flayers rise up at the same time.
Last edited by Priest; 06/11/2011:22 PM. Reason: typo