well, we may all be tainted by our experiences. in over 10 trips there, i had never seen locals wearing dry suits. the only two divers of many hundred that i interacted with that wore dry suits were a few from the northern climates (one german and one swedish i believe). and i do dive in trunks much of the time i am there in decembers past down to 24 m. nick, thanks for the url tip. i'll check it out.
in any case, steve, its not much of an issue since making a change in suit preference while you're there isnt much a problem. good luck and tell us of your experience when you return.