I 100% disagree.
I think a good way to determine if Sony is the best publisher is to ask yourself if Sony's hardware could survive by almost entirely its own published software? To me the answer is absolutely not.
While Sony does make some great titles and offers a decent variety, they don't compare to Nintendo's quality and variety accross portable and home consoles.
Nintendo has and easily can support its hardware with predominately its own software. Its actually a reason 3rd parties don't like to publish on Nintendo hardware as its too hard to beat the Nintendo published software.
Why is Wii and DS so overwhelmingly successful? Nintendo published software. Brain Age, Nintendogs, Wii Fit, Wii Sports, NSMB (both), etc, etc.
Sony can't claim that for any of their titles. Their consoles were successful based on the few high quality Sony titles and the large amount of 3rd party titles.
Additionally, you can't ignore sales. That's just asinine. Every year Nintendo and EA are pretty much the 1/2 for total published software. Difference is EA does it on as many platforms as there is available in the market (at least 6 at a time) whereas Nintendo only has two at a time (generally, rarely 3). This is an amazing feat especially when you consider one of EA's platforms is PC that has always been FAR larger than any console userbase.
Sorry, but Nintendo has been and probably will always be the best publisher gaming has to offer. For quality and variety.
The only area I'd concede to Sony is FPS/"M" rated software. But, that is just one small segment of a great multitude of gaming software.
