Well, in US 360 launched first and got Halo 3 out and had a lower price before PS3 even hit. Then PS3 got caught in a format war with HD DVD, HD TV adoption was slower than expected and there was a global recession. Also, this little console called the Wii arrived at ate most of Sony's former position. Finally, by the time PS3 launched 360 had a strong base built on groups of friends on Live while Wii (and PS3's price) was keeping it from selling to the more casual console market as the PS2 and PS1 had and while in theory from Sony's point if view the PS3 offered the chance of a BR player in the same way PS2 offered a DVD player the position of BR vs DVD was very different from that of DVD when PS2 launched.
The result, the Wii is on top, the 360 has done decent and the PS3 poorly. It's as simple as that in US (well, more or less I think).
Try to be reasonable... its easier than you think...
