They are about 10x the next best (Techstars) based on valuation of the companies they've funded (~$80B vs ~$8B). Valuation isn't a perfect metric, but it's a reasonable proxy for performance.
I think the numbers make sense with or without the total number of investments figure since the large outcomes in venture are driven by a small number of companies, and not the pack.
It is so hard to actually get the VC business model. If in all these years, every single YC company had failed except for Airbnb, YC would still be 4X better than the second best competitor.
