It feels a little unfair to compare fund groups from 2003 and 2006 to those that must be after 2009, when A16Z was founded. Give it a few years and we can have an article like this...
Also, comparing Sequioa's 50x return on WhatsApp to anything is going to look bad ;). The percentile data is more revealing and does suggest that the A16Z fund from 2010 is currently middle-of-the-road. Unfortunately, the article doesn't cite sources for this percentile data.
When you have a public market price reference it's pretty much irrelevant, but with the majority of the portfolio in non-listed assets, mark-to-market policies could have a large impact on your paper returns.