Fair point, the tweet wasn't quantitatively backed up. Interestingly the title above said "The standards for you are higher." and yet her paragraphs after that don't revisit that idea, but rather make the point that they ought to adopt a conversational style related to their background that compensates for what they say is a common flaw with women pitching (modesty about accomplishments). Which I think is a fair bit of advice to give anyone entering the valley, to have a pitch explaining why you're great to others.