Because of the head start of XBL and the boon of the FPS genre cementing in a community of gamers that inspire word of mouth and peer pressure to ensure gaming friends. Because the Kinect became successful after the casual market became tired of the Wii but was still willing to transfer over to another type of experience along with the advantage of a larger install base to also, inspire word of mouth and peer pressure to ensure gaming friends. Leverage, leverage, leverage. Game consoles are expensive. Since the 360 came out first and friends A, B, and C bought one what are friends D and E going to buy? Most likely 360s so they can play with their other 3 friends who wouldn't have the money to buy a second console and neither would D or E. It's a mixture of excellent timing and quality service.
Before the PS3 everyone was nice to me :(
