Their reaction to the loss of a game that they were headed in for only three minutes has been very telling.
Presented with the opportunity of the convenient scapegoat in the immediate aftermath of the replay for their failure to close out that game four weeks ago, Mc Grath politely declined.
Referee Diarmuid Kirwan's intervention had effectively swung the title in Clare's favour.
With his decision to overlook a clear-cut free for Jamie Barron before giving Clare a much less obvious free which Tony Kelly smashed between the posts before applying the coup de grace, it teed it up high for Mc Grath to open his shoulders and let fly.
Resisted But he resisted, insisting mistakes were all part of life and that they'd have to accept it.
The cup had barely been handed over to Cian Dillon and Tony Kelly but already Waterford had stolen a little march on June 5 through Mc Grath's good grace.
It was a clever piece of psychology not to engage the rage that was all around the county.
In these pages John Mullane pulled hard with his assertion that Kirwan should even consider his future as a referee after the decision.
The following evening Mc Grath explained: "The longer that becomes a side issue, any sense of 'we were robbed', then it becomes a negative.
"All the time Clare are preparing and almost saying to themselves, 'hey, they're saying it was a refereeing decision, we'll show them'.
It could become part of their process."Thus, the seeds were sown for his most important victory as Waterford manager, a victory that underlined that this team is in it for the long haul.
The All-Ireland title may elude them, so too might the Munster title in five weeks' time but Thurles on Sunday has crystallised a strength of character that will sustain them in the long term.