I decided to see what I could figure out from the known software we have whether or not this 10:1 for the Wii was probable. So here is the known software numbers for the Wii:
WII SUPER MARIO GALAXY 1.400.000
WII PLAY W/ REMOTE 1.080.000
WII MARIO AND SONIC: OLYMPIC GAMES 613.000
WII GUITAR HERO III: LEGENDS OF ROCK 500.000
WII MARIO PARTY 8 420.000
WII CARNIVAL GAMES 272.000
WII RESIDENT EVIL: THE UMBRELLA CHRONICLES 147.600
WII NIGHTS: JOURNEY OF DREAMS 60.800
This Equals:
Total software that we know at 4,493,400 for the Wii.
If we add another 1,350,000 for Wii Sports that gives us:
5,843,400 total.
The question then becomes can the rest of the Wii software out there make up 7,656,600 in sales in order to get a 10:1 tie ratio for the month. Assuming there are 100 other Wii games, that means that each one would have to, on average, sell better than Nights.
That just seems REALLY unlikely.
For comparison:
360 CALL OF DUTY 4: MODERN WARFARE 1.470.000
360 ASSASSIN'S CREED 893.700
360 HALO 3 742.700
360 GUITAR HERO III: LEGENDS OF ROCK 624.600
360 ROCK BAND 463.000
360 MASS EFFECT 401.000
That gives us a total of 4,595,000 in sales for the 360 games that we know. That is with two LESS games known than the Wii. So in order for the Wii to beat it, the average Wii game would have to beat the average 360 title in sales. Not impossible. Though I would have to say that Matt's report seems kinda weird.
Now I don't know the ratio of Elites, Pro's, and Arcade units sold, nor what percentage of them were bundles, but even if 50% of Pros and Elites were unbundled, if we count the Arcade pack in as a game that leaves us with an average of 1 game per 360 (probably a little less due to the Halo 3 bundles).
So let's put it at .9 per 360 sold, that gives us 1,134,000 in software from bundles.
That would put us at 5,729,000 in 360 sofware including bundles. This gives the Wii a slight edge. Though this number is a little flaky as we don't know the percentage of bundles out there, as well as the number of Arcades sold in comparison to bundles, it is likely to be higher.
So with bundled games, and known games, the Wii has a slight software edge. This is of course, with two less known games for the 360 as compared to the Wii.
Bottom line, while it is possible, though IMO it could go either way, that Wii software outsold 360 software in December, the 10-1 attach for the month seems pretty unlikely.
Edit: Ok, so while I was doing this JJConrad mentioned that Matt wouldn't count Bundles in on the software sales. Would he count them for tie-in? Because without the bundles a 10:1 tie is even more unlikely.