Sony isn't the one churning out the statistics reflecting PS2 success, jacksaddiction. The only region where it faces any competition in hardware sales is Japan, and only by the GBA SP.
There's a reason game retailers are "biased" in their console push; they're attempting to encourage strong consumer recognition by accenting the chief benefits of each console. You can and will lose sales by exhibiting personal bias, and confusing distinctive traits between consumer options. It's one of the oldest rules of retail.
Nintendo's been marketing Evanescence and the Fusion Tour heavily lately. I mean,
duh. I don't think it's a matter of Nintendo betraying their vocal approach, but rather acknowledging that they need to market to remain successful. It's in marketing that Nintendo falls vastly behind the competition, which is surprising given the success they found in strong N64 marketing.
I'd say that other factors, such as connectivity-leaning and franchise soaking go more against the fundamentals of the company established during Yamauchi's reign, Yamauchi himself a vocal critic of such market-begging tactics.