I'm skeptical. Most of these funds disclose at least the categories of assets they invested in - what is this asset class called and can you point me to a prospectus that mentions it?
To add to that, university endowments are also a big component of VCs, in addition to pension funds.
I think a couple years ago a judge ordered Berekely to release the fund performance figures for the VCs they had money in, and most of them don't even do well (measured in terms of IRR).