I think you should wait until either the PS3 gets a JRPG that's not a year old port or FFXIII outsells the 360 version 3 to 1 before you make such claims :)
QFT. Seriously people, why do you insist on this desperate crusade against the PS3? The PS3 has recieved no blockbuster JRPG this gen yet, the only thing it has gotten are SRPG, late port and Japan only released game that no one has ever heard of.
If WKC perform just as poorly as the above title, then you all have every right to be descend like a pack of jackals, because its a blockbuster release with high anticipation and if it bombs it DOES prove something.
Until then, comments like 'I guess the Playstation 3 really can't sell JRPGs' have no valid legs to stand on.