Do "Good" Companies Perform Better?

In an article found in Forbes titled "Who are our best corporate citizens?", http://moneycentral.msn.com/content/invest/forbes/P101993.asp, the idea that companies who are concerned with more than just the bottom line perform better in the long run is discussed. We are talking about this issue in my government and business class currently, and according to our discussions studies show no definate advantage to companies who are socially responsible. I personally think that if a company is socially responsible they will have a good reputation and therefore people will want to buy their products and invest in the company. Making that a company a good success in the long-run. I also think companies need to balance the amount of money given for the social good and the amount of money given to shareholder. I was wondering what others thought.