Yep, I can see there might be difficulties in ground-truthing under current conditions, but that's not what's bothering me. In one paragraph she claims to have discovered a very large number of "potential" sites; in the next, she claims a 90% success rate for her methods "in producing significant discoveries." To me, that smacks of equivocation. The success-rate claim is worded in such a way that unwary readers could assume it applied to the large numbers quoted in the previous paragraph. Perhaps her book explains more fully what the 90% claim is based on, but I think it's a little deceptive to have it on her website.