I also dont know what is true in regards of cold water. So, I use the ever reliable Google...
http://walking.about.com/od/fluids/f/coldwatermyth.htmQuestion: Is Drinking Cold Water During or After Exercise Good or Bad?
Is drinking cold water during or after exercise good for you or bad for you? Does the temperature of the water matter at all?
Answer: Believe it or not, cold water is absorbed faster by your body than water at room temperature or at body temperature. The American College of Sports Medicine recommends that water and other drinks be chilled when used for exercise.
Cold Water and Cold Drinks Rehydrate Faster
Research has shown that cold water passes through the stomach faster and is therefore sent to the intestines for quicker absorption. During and after exercise, you want to rapidly replace fluids lost due to sweat, so cold water and cold sports drinks are preferred.
Cold Water and Cold Drinks Taste Better
Another reason for drinking cold drinks is that most people find that they taste better, making you more likely to drink more and more often.
Cold Water Does Not Cause Cancer
Bull. You do not want to quickly replenish fluids to your body after exercise as it will cause mineral imbalanced in your body which is bad. I have read many articles where your body needs to completely cool down before drinking lots of water unless you're feeling thirsty otherwise you just need a sip.