We can monitor games output over the past couple years. If you think Nintendo's output will accelerate, that's an argument of faith. If you have seen indications that, say, they've hired significant new staff, and created new development teams, that would help your argument. But just stating that things will turn around "because of course they will", that's not a defensible position.
As a matter of fact...
They're up to 5,095 permanent staff as at September 2012, up from 4,394 in December 2009 between all their branches.
Other companies/first parties:
Good Feel: 72 (Oct 1 2012) - previous unknown
Game Freak: 90 (April 2012) - up from 52 in 2007
HAL Laboratory: 140 (Oct 2012) - up from 128 in 2008
Brownie Brown (1-UP Studio): 32 (April 2011, current unknown due to restructure)
Monolith Soft: 92 (March 2012) - up from 83 in 2009
Intelligent Systems: 127 (Nov 2012) - up from 115 in 2007
Retro has expanded into two teams, they've contracted a lot of second-party developers like Grezzo and Treasure to make games for them, and they're generally trying hard.