In the Wall Street Journal is an article by Kathryn Kranhold. In it she interviewed a Ellis Yan, major owner of TCP, the largest manufacturer of CFL's sold in the USA. His product is under most if not all major names in the lighting industry. TCP makes 70% of the CFL's sold in the USA.
One thing that caught my eye was, "When a bulb burns out before it's projected 10,000-hour life, TCP replaces it".
I don't use them but my wife has one in her reading lamp. Everyone concerned about CFL's needs to look the article up and read it. It was in the Business section of the Courier-Journal in Louisville Ky. but I am not sure if it was the full length article and I don't know which issue of the Wall Street it appeared in.