Looking at Vita for a moment to see if any parallels can be drawn for Wii U.
Vita was selling at 4K/week prior to the price drop and Walking Dead bundle.
The month of these events it sold 29.5K, with those SKUs out for ~2 weeks.
Assuming about 8K for the two weeks prior to the new configurations, that would leave around 21.5K, so a post-price drop weekly average of about 11K within the tracking period or a 2.75x increase.
This month it's sold around 41K, or a weekly average of ~8.3K, so an approximate doubling of the baseline, but a 25% reduction from the post-price drop peak.
Wii U was selling around 8K/week in August.
It sold around 95K this NPD, with about two weeks of new configurations. So an approximate weekly average of 36K post price drop or a 4.5x increase in those weeks.
In theory the Wii U could see something like an 60K month for October if it also sees a baseline doubling. Or it could see an 100K month for October if it only sees a 25% drop from the post-price drop weekly average.
Of course this is just speculation based on incomplete information. For example it's entirely possible that Vita hasn't seen a baseline doubling and it's sales were, for instance, something like 10K, 9K, 8K, 7K and 6K, through the weeks of September tracking on it's way back to it's past sales.
Code:
Wii 42K
360 179K
PS3 216K
Wii U 95K
PSV is >40K. 3DS is top selling hardware, so greater than 216K.
Also, this is a compilation of other info:
- Killzone: Mercenaries - 41K
- Rune Factory 4 -17K
- Etrian Odyssey Untold: The Millennium Girl < 10K
- PSV > 40K; Walking Dead bundle 24.4K+
- The Legend of Zelda: Wind Waker HD - 123K including bundle
- Rayman Legends < 70K; Wii U SKU 38.85K or less.
- The Wonderful 101 < 20K > 360 or PS3 SKU of Rayman Legends
- Diablo III - 550K; 360 SKU - 335.5K
- GTA V > 7M including bundle; 360 SKU 4.06M+
- Kingdom Hearts 1.5 HD between 270-275K.
- Brain Age: Concentration Training LTD < Wonderful 101 < 20K
- Minecraft LTD >1M