Please note that this thread is not intended to make out as though this is important. It's to emphasise the absurdity of the other threads.
Here's the exclusives the Wii U will have had in its first year:
New Super Mario Bros U
Tank! Tank! Tank!
Game Party Champions
Your Shape Fitness Evolved 2013
Family Party: 30 Great Games Obstacle Arcade
Rapala Pro Bass Fishing
LEGO City Undercover
Game & Wario
The Wonderful 101
Donkey Kong Country: Tropical Freeze
The Legend of Zelda: The Wind Waker HD
Wii Party U
That's 18 titles (not counting New Super Luigi U, which I'm treating as DLC with a retail release, rather than as its own game). It's also not including the following, which may make it within the first year:
Sonic Lost World
Mario & Sonic at the Sochi 2014 Olympic Winter Games
And it isn't including the following that may be argued as exclusives, but have a 3DS or Wii version (or both):
Transformers: Prime - The Game
Monster Hunter 3 Ultimate
The Croods: Prehistoric Party!
Scribblenauts Unmasked: A DC Comics Adventure
Dragon Quest X (recent PC version announcement notwithstanding)
Note that I didn't include any game set for release in December 2013.
My point? That when they say "15 exclusives" or "20 exclusives" for the first year, it's not that big a number. The Wii U managed around the same number, despite poor third-party support.