If you truly want to examine bias, then it necesitates that you be objective. To objectively analyze bias, you must abstract the scenarios and behavior away from the actors and see if there is no logical reason for the behavior.

Otherwise, your own subjective opinions are clouding your judgement.

Irregardless of accusations of bias, does it make sense for 3rd party publishers to support a device that does not support them when there are other device that the former competes with that do? Only if that device has the marketshare to warrant the oppurtunity cost.

Now we can add context to our question. The Wii U neither explicity supports i.e was developed in mind of 3rd parties and it does not have significant marketshare to warrant the cost. in this scenario, it is impossible to identify bias objectively because its rational as well.

Seeing as EA, and lots of other 3rd parties, supported the Wii, its marketshare was enough to overcome any anti-nintendo bias they might harbor, so it is illogical to assume that this bias alone is the reason for the Wii U's third party supported.

Whether or not they have no bias, is impossible to objectively know for sure, but we do know that money can easily overcome that bias, so its not even relevant.

Everyone has Biases, but when your a AAA publisher, those biases are practically irrelevant.

the bolded is neither true nor bias for nintendo platforms (or any platform).

Where is that major market you believe exists on the Wii U ?

Sales certainly point to the fact there is no such market. 

Before 5 years the 64 and GC failed without third party support. The Wii succeeded due to the casual market with only the shovelware selling. Games like Zelda, DK, Metroid and the traditional Marip games failed to mach the success of Wii Fit and Wii Sports or Mario Kart. That is what hurt them and why they are dead right now as the WiiU is a colossal failure. Nintendo is nowhere near the strongest as they have never sold over 100 million consoles until the Wii.

Anyway why bother putting third party games on a console that is dead when the games would not sell anyway? Who even plays third party on Nintendo? People play them on PS/Xbox as no one who is a true gamer should only have a Wii LOL.

some titles are doing good, others are doing bad, same for the competition.

Actually, most are doing bad on the Wii U. Though I know you'll find a spin to this fact.

It should be obvious the only reason the Wii U, isn't outselling PS4 right now is because of supply constraints.

Wii U has everything going for it, price advantage, game advantage, year lead.

IVE NEVER EVEN SEEN A WII U IN STORES!

It's kind of hard to not be biased if putting their games on the U will only cause them to lose money. It's a money making scheme for developers as much as it is anything else. If people aren't going to buy the games, you can't blame devs for refusing to support.

They'll make no money on wii u. It's not being biased it's being truthful