Numbers are about what expected.  I think the 360 has an install base about 40x the size of the Wii U in the US.  About 20X for the PS3.  So, it makes sense to expect numbers to be lesser for the Wii U.  Maybe not 40x less (since a higher percentage of Wii U owners should be active users), but significantly less.  The sales on the Wii U were about 1/20 of the sales of the 360.  We'll see how the sales figures play out, but the numbers make sense.  Percentagewise about .4% of XBox 360 owners bought the game and about .5% of Wii U owners bought the game.  You'd like the Wii U number to be higher (since the XBox 360 install base number is inflated by replacement units and such), but I really don't find the Wii U numbers terrible considering the install base.

Fanbase is also a factor.  Naturally, the Wii U's audience skews less towards TPS games than PS360 does or PSOne will.  On the other hand, we saw Disney Infinity have a nice opening this week.  33K for the Wii U compared to 88K for the XBox 360 is pretty good considering install bases.  So that's about 2.2 of the Wii U audience buying the game as compared to .02% of 360 owners.  Hopefully this will bode well for games like Sonic Lost World, Skylanders Swap Force, Yarn Yoshi etc.

Big problem is just the install base.  I think Splinter Celll Blacklist sold about as well as it should have considering the amount of systems out there and Nintendo's fan base.  The numbers obviously are not great, but I don't think they're horrific either.  I think that if the Wii U base expands it will be a viable place for these kinds of ports, and I do think the base will expand significantly over the holiday.

at least here in germany the game was released on the 22nd for all versions ...
don't know about other countries.

I checked. Its not good.

Its at 54 in the UK chart, it didnt appear in the German chart and its 67th in the French chart.

ouch, actually its even worse than not good :(

well doesn't help either that the wiiu version is the most expensive one ...
47€ pc, 54€ ps360 and 59€ wiiu ... at amazon and almost the same at my retailer next to me

This is why I still come here, every once in a while someone has an intelligent thought and puts it into words instead of just a not-so witty response to a not so witty response (not talking about chapset's post - its actually in some ways a valid point).

On topic so that I'm actually contributing as well:

I think Splinter Cell would have also done a little better on Wii U if it had been advertised even in the traditional ways (I saw several advertisements for it and they All showed the box and logos for PS3/360/PC but not Wii U) I don't get why this happens, it would almost literally cost Ubisoft nothing to add the 4th box and logos to the bottom of the exact same advertisements and even if it boosted sales by 100 that's still not 0 for again almost literally no cost. I won't try to speculate how much it would actually affect as that would just be a complete shot in the dark guess.

Also I read some of the comparisions and while it sounded like the Wii U port looks pretty good compared to the others it has some framerate issues so it's hard to definitively call it the superior version which does matter to some of the biggest fans of series like this.

I flirted with picking this up, and may when I have less to play/buy but I have so much to get right now and am a little tight financially so unfortunately I did not contribute to these numbers (in favor of W101 actually, still planning on getting either ACIV or WatchDogs this fall though).

I didnt know that. Quite shitty of them to price the game higher, on the system struggling to get going.