If you've got issues with what he wrote, I'd be interested to see what specifically you feel he got wrong. But regardless, I think he deserves credit for digging into Groupon financials, and for calling out the lack of substance well before most people did. Jealous or not, the collapse of the daily deals space and Groupon's sickly stock price suggest that he was broadly correct at a time when most financial journalists were hyping Groupon and its stock.