Vinny says here that Pop was one of the pro coaches that text him:
As Del Negro shoveled some popcorn into his mouth, he unearthed his BlackBerry out of his pocket. He squinted at the screen, held it up and said, "Fifty-two [text] messages. I bet there are five pro coaches in here."
[...]
He started to scroll the messages, and there was a congratulatory text from Dallas Mavericks coach Rick Carlisle. "Rick always calls me … and Doc [Rivers] … And Pop … "
He thinks for a moment. "And Mike Fratello, he calls."
Class Pop!