Perhaps it would be best to say that the "best divers" probably have the widest range of experience in terms of diving conditions. A diver who dives only cold water and one who dives only warm water have not experienced the opposite conditions, equipment, etc. You can get pretty "dialed in" to the conditions that prevail in your usual dive sites in either setting, but be unprepared for the other conditions. However, I think it is fair to say that cold water divers are better prepared to do warm water dives than warm water divers are to do cold water dives.
I feel comfortable saying that because I have observed many examples of divers facing the opposite of their normal conditions. In general the warm water divers have more trouble adjusting to cold water conditions and equipment than vice-versa. However, there are always exceptions. When Walter came out here a few years back, he didn't seem to have any trouble adjusting. Divers who are skilled from either environment probably adapt much quicker.
I guess I should consider myself a Luke-Warm Water Diver (LWWD) rather than a cold water diver because I have yet to dive waters less than about 48 F.
I feel comfortable saying that because I have observed many examples of divers facing the opposite of their normal conditions. In general the warm water divers have more trouble adjusting to cold water conditions and equipment than vice-versa. However, there are always exceptions. When Walter came out here a few years back, he didn't seem to have any trouble adjusting. Divers who are skilled from either environment probably adapt much quicker.
I guess I should consider myself a Luke-Warm Water Diver (LWWD) rather than a cold water diver because I have yet to dive waters less than about 48 F.