Emigre, sometimes I don't understand you, but you're still on my "top of GBATemp members" list.
I don't have either systems, so my claims don't really have anything to do with facts. The main thing I get from what Miyamoto stated was that there was a lack of software at launch. I don't care about the fact of how sales are doing right now (and, yes, I agree the point of the Vita only being out for a short amount of time is very contributive to the fact of lower weekly sales, and I'm sure that will pick up in due time), I care more about the theory related things in the opening post that do with sales: having the proper software for the system (and other theories that go into it is, of course, the game base in due time). I also think of one other thing that Miyamoto said: width and depth. The Wii was used in that case, where he felt that the width was there for a lot of people to buy the system, because of some game they could get with it, but the depth was absolutely missing for the more serious gamers. Sony and MS covered the depth a lot better, but they completely miss on casuals IMO, unless the casuals get into a certain game because one of their gamer friends showed them it. The game base on the respective systems was not there as well, thus the word of mouth only applied to gamers than casuals.
That's the biggest challenge any company will face: Providing the things for those who are more serious, but not focusing solely on that so that everyone else is excluded. To give an example: The biggest thing in the DDR community here is putting a whole bunch of songs on our local machine for the community. That COMPLETELY turns off the casuals though that have no idea where to go when the play the machine :/ It, personally, bugs me, because I WANT the more casuals to be into it.
The same thing will go for the 3DS and the Vita: Both companies will look for getting as much money as they can, but it also has to be marketed right. Nintendo's mistake at launch was two things to me: High price and lack of software. Sony's mistake at launch was two things also to me: Lack of knowledge of system and lack of software. In Nintendo's shoes, I would also use the same comment of something that two companies had similar problems, and "talking down" about how the other company did not look at someone else's mistakes, while still showing themselves as goody goody people that just care about the people. Marketing 101, yo.
tl;dr - Thread is out of proportions IMO. Companies both had faults, one softly attacked the other to improve their image, and it's a basic tactic of ignoring all the facts and having people look at just the one thing that was comparable between the two. There's other contributing factors that are ignored, and if anyone takes a moment to step back and do some research, they'll discover those other factors easily enough.