I should say the perception of not giving a shit, from my perspective. In that the conference seemed either unprepared (long winded, poor explained Nintendo Land demonstration), or the company uninterested in selling their product as something very new and unique. Lot's of 'safe' games shown, ports, and a general sense of treading water versus making a big deal of everything.
And again, this perception is due to the way Nintendo had beautifully handled past console reveals. Both the pre-launch E3's for the Wii and 3DS were quite wonderful and a showed a big investment from Nintendo. E3 2012 lacked this, I felt.
I perceived it as a socially isolated company that is really bad at tapping into what public trends are in America. From my perspective, they totally misread what made the Wii cool and exciting and attempted to repeat it with a more complex product that is much abstract in concept and thus more difficult to explain. I honestly think they've always been bad at reading American culture and the "good launches" were flukes.
The Wii innovation was easy to see and demonstrate. With the 3DS the "wow" comes quickly because of the 3D screen. The WiiU is a bit more difficult to explain and show off.The DS had a slow-burn at first because the dual screen concept was more abstract and difficult to explain. They also mainly showed off abstract tech demos for a while before launch and launched with a rehashed Mario game.The WiiU launch and the DS phat launch are similar in many capacities.
I agree they failed to generate excitement around their product in the average consumer, but it's also possible that wasn't something that was in the cards with the product they were bringing to market.
I think it's spurious to automatically correlate a the quality of a product debut presentation with the amount of effort put into it. Launching a a product and gaining public perception is much harder than merely trying, no matter how effortless they have made it look in the past.