If EA was making a profit on Wii exclusives, relative to 360/PS3 multiplats, I feel certain that they would know it -- being a public company and accountable and all that.
The revenue numbers, thus, tell a story. The revenue on Wii exclusives is the same as PS3 multiplats. Apparently, perhaps even obviously, the money to develop/market/etc. the average Wii exclusive exceeds that of the average multiplat PS3 title's portion of multiplat development.
Every assumption that Wii games are, indeed, made from $5 and a unicorn fart is true -- but unicorns are really quite rare, and getting one to fart for your game apparently costs many millions of dollars, so it works out poorly for the Wii in the end. EA is asking Nintendo to remove the unicorn fart part of Wii software development for this reason. Maybe allow for pegasi or specially trained Lipizzaners instead.
Jokes aside, Wii development isn't as cheap as the average forum joe likes to think. It is a fair amount cheaper, but not so much so that it can come out the clear winner in today's marketplace, especially when the Wii stands alone (from an architecture perspective), and requires an entire dev team all to itself. The Wii cannot get out of the demographic scatter issue, or the architectural uniqueness issue. These are pretty severe problems, in the end.
