Here's a public doc that shows returns for a few USV funds: https://www.oregon.gov/treasury/Divisions/Investment/Documen... (search for "union square" in the PDF)

Union Square Ventures 2004 -- 67% IRR

Union Square Ventures 2008 -- 28% IRR

Union Square Ventures 2012 -- 42% IRR

('04 is particularly impressive because it was 14x fund at the time that the linked PDF was written)