"Fool's Gold" double entendre?

Scott Shane's recent book about business angels, Fool's Gold states (p. 126-127): "To see what I mean, take a look at the data. ... "Many angels do not accept unsolicited deals but only accept referrals from people they know and trust"7

Footnote 7 refers to Stephen Prowse, (1998). Angel investors and the market for angel investments. Journal of Banking and Finance 22, 785–792.

Here's the relevant passage from Prowse on page 789: "The primary criterion that angels use to screen proposals is whether the entrepreneur is previously known and trusted by them or by an associate who they trust." But this is based on "impressions from interviews with a dozen or so business angels in the Dallas/Fort Worth area." (p. 786).