Next time you are on holidays in another country send three postcards to people who live in the same general area- bet there is at least a few days variation in the dates they arrive.
I think the dealers would know we compare delivery times here and I don't think they would want anyone to get jealous- :-)
If you add to the other points raised above the fact that rep manufacturers tend to continually attempt to improve the quality and likeness to original of the products (incurring tooling costs) and production runs are small compared to most of the cheap and cheerful's things don't seem too bad.
As to water resistance- have you considered that waranty terms we almost take for granted on almost every product we can think of may not be offered by the manufacturers of reps? Dealers are more likely to suggest keeping it dry than have every second person asking for a new watch cos the caseback wasn't tight or someone left off a crown o'ring.