According to several sources in WWE, CM Punk's apology on Twitter was written by Punk without the prompting of WWE officials. While WWE higher-ups were definitely talking yesterday about Punk's actions, the controversial Punk was apparently legitimately embarrassed by the video and posted the apology before the WWE officials got involved.
"Punk was telling everyone in the locker room that he felt like a complete douche," one wrestler currently on the tour in Australia told WrestleZone this morning. "His tweet were in his words, because that's how he really felt."
We'll have much more on this breaking story as it develops.