I, personally, don't subscribe to the 'cold water' training must be better mentality. You will encounter this, I am sure. There are pros and cons to diving in any water environment and what matters is the quality of training, the quality of the instructor, and the divers individual mindset; in how they prepare for those conditions. From my personal experience, the divers who shouted loudest about the superiority of their training and experience (whether that is cold-water, or caves or whatever) tend to do so because of other, more personal and egotistical issues.
Fully support this statement, I've seen a number of 'experienced' divers get into trouble because of this attitude.
Regards