I saw Mark speak and give startups feedback at an event in Phoenix, Arizona just last month. He does exactly as the article lays out. His talk was interesting,

I saw Mark speak and give startups feedback at an event in Phoenix, Arizona just last month. He does exactly as the article lays out. His talk was interesting, and not the usual Silicon Valley advice. For example, he likes to invest in single founder companies. I saw him give feedback to three companies. One of them, a company that sold tech to restaurants, he bluntly told to start over. He said he didn't want to get in a big debate about it. They were overly nice, and tried to arrive at a happy middle ground, but Mark would not let them. 'No, it will fail.' he told them over and over. The guy is definitely on the abrasive side, but I'd also put him in the class of smart money.