Hmm this seems like a strawman. There was a Kauffman report a few years back pegging median age of successful founders at ~39. I think most VCs have known this for a while. The young-founder stereotype is a pop-media stereotype.
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"VCs believe they have 'pattern recognition' abilities that they simply don’t have. Instead, they rely on suppositions and stereotypes that don’t match the underlying data on startup success." tcrn.ch/2HmuO8J

