Also who knows how many of that 15.19 are rebuys of broken (red-ringed) x360s (see the game sales of multi-platform games in this region). It's awesome to see a system like the PS3 that spend as long as it did 3rd in this region finally becoming 2nd to the wii.
Why sigh? Its actually a pretty good argument, check the weekly software charts for "others". Youll notice that PS3 sell more on all multiplatform, sometime even 1/2 1/3 more. On rare occasion 360 sells more but only by a very small margin (check modern warfare as example). The funny things is except modern warfare, even FPS get more sales on PS3 in "others". If you want to "sigh" on his argument you would be better at least find another reason or factor that explain those sales. Until you do that, he have a very good argument.