although peter disclaims any specific intent to persecute jakob nielsen in the Report Review: Nielsen/Norman Group’s Usability Return on Investment, it’s still fun to look for evidence of mudslinging:

“Unfortunately, the NN/g report does not seem to follow this advice. Although it does make a reasonable anecdotal case for investing in usability, the report methodology is so fundamentally flawed that any financial analyst worth her salt would immediately question its findings.”