Cancer Controversy Causes Consumer Confusion

Analysts told ABC News.com that the memo would make little impact on the market.

"[Herberman's] theory would have to be seriously corroborated before people began to abandon a technology they are so closely wedded to," said Robert Enderle, a technology analyst and president of the Enderle Group.

"Even if a conclusive link was discovered, I doubt it would make much difference," he said. "People know cigarettes are bad, but they continue to smoke. There are laws requiring people to use headsets while driving because of the danger, but you see people talking on their phones when they're driving all the time."

The Associated Press contributed to this report.