Here's something interesting from:
http://phx.corporate-ir.net/phoenix.zhtml?c=115024&p=irol-newsArticle&t=Regular&id=828850&
"When it comes to delivering superior return on investments, Tillerson pointed out that ExxonMobil led the industry in 2005 with return on capital employed (ROCE) of 31 percent. "In our view, ROCE continues to be the best overall measure of financial performance given the long-term and capital-intensive nature of our industry. I would be cautious of anyone who tries to deemphasize it," said Tillerson."
You have to admit, 31% is really something for a mature commodity. No?
Even Microsoft doesn't get that.