Washing your face with cold water freezes your butt. Hmmm, never heard of that one.
Lol, had to say it, sorry.
To answer your question, I've never heard of that one before. I've always used lukewarm water. Personally, I don't think it makes a difference. The way I see things is, it matters what you put on the inside, like your diet and stuff.
Eat blueberries and fruits that are very full of antioxidants.