Taking something a 2chaner or a Net Otaku says seriously is a humorous issue foreigners in Japan have. (Not sure if you are or not0
Chinese foodstuff is cheaper and not worthless in Japan. I know; I buy Chinese food in Japanese supermarkets all the time and I'm not the only one. It's the only way to get garlic for less than 3$ per head. It's not labeling food as Chinese that is a huge no-no in Japan (like the fish problem they had last year)
The upper class types I know think the Internet is low-class and never post on message boards or news discussions. Much like how few people here post in CNN discussion threads. It's like arguing with the lunatic fringe; why bother?
In the end, in most cases, the media manufactures consent and everyone forgets about it.
I think they usually hang out around other, Japanese-related boards. /b/ has little respect for anime or anything in general, and it's almost impossible to organize anything in the huge, fast-moving mess it has become.
I think fair amount of Japanese will be satisfied with this, and even like Groupon more than before the incident. It looks like similar to apologies done by Japanese executives, though Mr. Mason did not do deep bow.