I guess I've been lucky, all the Rolexes I have from Joshua (Subs/GMT/YM/ExplorerII), SFSO Asian, Non Chrono PAMS and Ferrari 08, and Chopard GTXL Asian have all been in water (shower/swimming/jacuzzi/turkish bath) and made it with no problems! I have since opened all of them and greased the caseback and crown/tube o-rings. I have two Radiomirs from TTK that I did the same and so far have been fine in water. Look here: http://www.rwg.cc/members/index.php?showto...hl=torture+test
On the other hand, I learned not to trust the Chrono models! I made the mistake of wearing my Navitimer TT and PAM 253 in the shower and regeretted doing it.....they've been serviced since, so they're ok, but that's the last time I'll wear a Chrono in water, except the Ferrari 08....that thing is build like a tank!