NaNoWriMo teaches showing not telling

I am sure we are all aware of NaNoWriMo by now but if not I wrote about it in a recent blog that you can check out here.
There are many ways which people use to try and hit the 50,000 words needed to be a winner. Some do not use any constrictions which can lead to some rather stilted dialogue. Others insist on putting every characters full name each time they speak which makes no odds if you character is called Cher or Madonna but can significantly increase your word count if you are including...