AnimeTheme said:
"Wii SW > 360 SW" as Matt said clearly tells the message, and should be believable (unless someone can disprove it otherwise). However, the 10:1 thing means little useful other than giving a vague impression that Wii SW sold well. We don't exactly know how he calculated it which may affect the accuracy (such as roundups or inclusions of Wii Sports/bundles), so any attempt to extrapolate it to get other figures is basically pointless, and as discussed before, this monthly tie ratio is not really a clear indication of the change of LTD tie ratio trend (mainly due to hardware shortage).
We do know some things, because we know it's NPD data he's speaking of. Therefore, it does not include Wii Sports. It does include bundles in this case, because there are no official Nintendo bundles going on--store bundles are simply individual sales that the store is forcing on the customer. It also does not include Link's Crossbow Training (because NPD tracks it as the Wii Zapper, an accessory), but does include Wii Play (because NPD tracks it as software).
We don't know about rounding, true, so that means the Wii sold between 12.825 million and 14.04 million units of software in December. That's using the already rounded 1.35 million hardware units times 9.5 and times 10.4. No reason to go beyond one decimal, I figure.
That's not exact, but it's hardly a "vague impression".
But, like all NPD data this year, it's fairly pointless. We didn't get this info every month, so it's impossible to see whether this was a linear overtake based on the closing hardware gap, or a holiday spike that was larger for the Wii than the 360. Unless we get this info next month, I suppose.