I don't remember reading anything like that, but I do agree.Correct me if I am wrong, but didn't someone say a while back that Nintendo was planning to have a short announcement to release window.
September (A) to November (R) I could see as the earliest possibility. Personally I'm more of a Feb-Apr, or May-July guy as the earliest though.
Metroid Prime Remastered was announced 2 mere weeks before its physical release and had no retail leaks.
(OK, It kinda leaked from a dev and some guy lost his hair over it for being just slightly wrong, but still).
If Nintendo announces NG today, a single tweet would melt servers.
Enthusiasts would trend it for weeks.
Casuals even remotely connected to gaming would see ads for a month and take notice.
Bowser would appear on Conan playing Horace and saying "pre-order now"!
I don't believe there will be less than 6 months between announcement and release, but I think 3 months would be more than enough and still sell anything they can produce.