Here is an article I found about the subject. I agree with most of it, though I had a slightly different take on a few points. Its a bit of a read, but if you have the time please give your $0.02 about your opinion of the opinions shared in this article.
Martial Sport vs. Combat Training
http://www.nononsenseselfdefense.com/sportmartialarts.html
Martial Sport vs. Combat Training
http://www.nononsenseselfdefense.com/sportmartialarts.html