Whether its true or not (I personally believed the Perk thing was always just a convenient excuse), I am glad everyone involved with the C's seems to be taking a united stance to not use that excuse anymore.
Ainge said the same thing on WEEI yesterday, as did Pierce and Doc. At this point, they can see that it is just an excuse, and now that the playoffs are here, excuses like that do not hold any water.
They know that an excuse like that can let them slide by if they aren't playing well, but now that the playoffs are here, they are going to have to take ownership for their play.