Earlier quoted context omitted.
For what it's worth, these two were both on the audit committee which was criticized in the wake of the earnings restatements last month: "Groupon needs a new audit committee with much more financial expertise," said James Post, a management professor at Boston University. http://articles.chicagotribune.com/2012-04-12/business/chi-g...
I don't really buy that. If CFO and auditors are doing their job any reasonably competent business professional can provide adequate oversight. If the board member isn't capable of adequate oversight the problem lies with the financial information they are being given, very rarely the board members.
Enron's audit committee was later criticized for its brief meetings that would cover large amounts of material. In one meeting on February 12, 2001, the committee met for an hour and a half. Enron's audit committee did not have the technical knowledge to properly question the auditors on accounting questions related to the company's special purpose entities. The committee was also unable to question the company's management due to pressures placed on the committee.[59] The Permanent Subcommittee on Investigations of the Committee on Governmental Affairs' report accused the board members of allowing conflicts of interest to impede their duties as monitoring the company's accounting practices. When Enron fell, the audit committee's conflicts of interest were regarded with suspicion.[60]