So, what objective measure would you propose to determine 'better' - bearing in mind that's a rather subjective term. Which is the 'better' candidate in an election? Heck, even the
Green Party Pentax supporters get their own way.
Please don't drag this in to a political argument(although that was my first thought,) It's way too easy to get people riled up already.
Honestly, I think both Canon and Nikon make excellent products. Some companies make features that appeal to some buyers, some others. I honestly don't think anyone can objectively choose which one is "better." Canon certainly has a better selection of lenses, however at launch their prices have been much higher than those of Nikon the last couple of years.
What I want to know is, what was the market share of 2008, 2009, 2010, 2011, etc. On it's own, the market share of 2012 means a little, but if we compare it to the past few years, we may be able to spot some trends which will give us greater insight in to which manufacturer is gaining ground, or losing ground.