I think it's other way around:
Officials had nothing new to say to bitcoiners. Government talk to bitcoin community not by chatting on meetings but by issuing regulations and making seizures The purpose of the meeting was not to pass some information to the BTC people, but to get it from them.
Therefore: the whale was not a bitcoiner, but one of the officials. After the meeting he decided to invest his personal money in BTC. And he has vested interest in BTC now.
tl;dr: The whale is our new secret ally in the enemy's camp
I "liek" your style, but how did he get his money into gox so fast?