While I agree that the current PS3 demographic probably doesn't lend itself well to blockbuster R&C sales, the fact it is a well known IP that was released in the form of an amazing game begs the question why aren't PS3 owners buying the best the PS3 has to offer?
The Sims is a well-known IP as well, but if that came out on the PS3 I wouldn't be buying it.
Nintendo has older gamers who buy "kiddie" games, and even a game like Kameo on the Xbox 360 (new IP, decent quality) sold very well.
Kameo sold well (honestly though I wouldn't say it did) because it was part of the 360's launch madness; not only a launch title seeing the usual spike, but launched in the environment of the forced bundles that MS was doing in conjunction with retailers. And Kameo figured prominently in those bundles.
As for Nintendo, frankly I think the recent Metroid should be doing better considering its own excellence, and it's not even kiddie. But what? You can't
make an audience want something that isn't what they bought the system for.
But that still doesn't explain why an excellent game like R&C pretty much went overlooked by most PS3 consumers in NA. You look at the sales of their other recent releases (like HS, Lair, etc) and it begs the question: What are PS3 owners waiting for?
I don't think PS3 owners are "waiting" for anything per se; but I personally don't go and buy new games just because they're new. It has to interest me. To use the word 'excellent' as synonymous with 'appealing' I think is a faux pax here; again no one is saying R&C isn't great, but I can recognize excellence in motorcycles as well without coveting them.
Why R&C didn't blow the doors off at retail should be obvious to anyone; to accuse the PS3 owner base of either apathy or standards beyond the pale is neither here nor there. When MGS4 launches, it will sell. When FFXIII launches, it will sell. Killzone 2, Resistance 2, etc...
Not because these are big franchises, but because these are titles the
present owner base is drawn to.
Say what you will about budgets and titles, but I doubt heavily that many of the present PS3 owners bought the system for themselves thinking: "Ratchet." Great game though it is. You view Ratchet's bombing in absolute terms; I view in relative terms. It met my sales expectations, for better or worse. Though I'll add I think it'll have decent residuals through year-end...