I agree with that, but in this case I am concerned that pulling out that sort of statement sounds like a serious criticism of the referee, whereas in fact it contains no useful information. We do not know which 3 decisions were supposedly wrong, we do not know why they were wrong, and we do not know if that was typical of his game generally. They might all have been close judgement calls.
If they were close judgement calls, I wouldn't expect that POB and BL would have admitted the calls were incorrect. I too would like more specific info on what PKs they are talking about. Are you refering to the team management or Greg Martin's comments when you say, "pulling out that sort of statement sounds like a serious criticism of the referee" ?
I think that it could be seen that way coming from the commentators on the Rugby Club but I do believe that the motivation for Deans & Co to ask for clarification of some of the decisions BL made is to rectify any problems before the QF. They would be mad not to. Deans is no fool and he would have to be one of the most restrained coaches going around. I doubt that he would be up for criticising a referee prior to a RWC QF.