Demanding "data" from other people without explaining why that person has the burden of proof to produce data for something they have already explained while the requester has simultaneously also provided no data on anything is one of the laziest and lowest value takes that frequently gets repeated on here.
I don’t know this to be true, but I feel like I’m claiming the null hypothesis here. That it’s not determinable.
PE held companies are not liquid and undergo significant changes.
For example, say a PE fund invested in a new EV company a bit over a year ago, at a valuation 10x trailing revenues, and then the fund doubled the valuation of that investment to 20x trailing revenues because Tesla (TSLA) was trading at 20x. All investors happily went along because they could show a +100% gain on this investment by the fund. Now, however, TSLA is trading at 4x trailing revenues, but the fund manager contends that it should ignore a capricious stock market and treat the investment in the EV company instead as if it were still worth 20x. All investors in the fund are happy to go along with that too, because otherwise they would have to recognize and report a loss of ~80% on the fund's EV investment.