Though pointing out the success of PlayStation 3 launch titles such as Resistance and Motorstorm, Sony executive Phil Harrison told Game Informer magazine (via GI.biz) that "it's always dangerous to judge any system by its launch lineup," while adding, "you only have to go back to the games that launched PlayStation 1 and Playstation 2."
Excellent observation! Indeed, if we remember when 1UP compared launch lineup review scores, there is a curious (albeit not stringent) trend: the two consoles on the list with the worst-reviewed launch lineups belong to consoles (Wii and PlayStation One) who have shown great success, whereas the opposite has also proven true (GameCube and Dreamcast had well-received launch titles).
Given the trend, then, we say Sony should embrace the notion of a lackluster PS3 launch. They've got a good statistical probability of pulling out this generation (especially if calls for a price drop don't go unheeded).