The Detection Protocol was designed by lynx expert McKelvey to, among other things, be sure that the lynx would not be over or under detected. When these biologists and their supporters bad mouth the Protocol for underdetecting, they are also implying that that overdetection is likely. Or that the Protocol is flawed.
McKelvey did a newspaper interview(which I can't find now) in which he blasted these biolgists and their supporters because of the damage they are doing. McKelvey's testimony at the Congressional Hearings, in which he tries to defend the Protocol, is here