The Wii came out a year after the 360 and the Wii trounced the other consoles in terms of sales. The PS3 just passed the 360 in worldwide sales, but considering Sony dominated the previous two generations, it's hard to call that a win.
looking back at the 360 coming out before the ps3, it did so much better in sales(as i remember it). does getting the jump on another company make the difference?
I think it definitely helps. However, Sony botched the launch of the ps3, so I think that had more to do with their early struggles than the 360 launching a year earlier. The PS3 was stupid expensive, only had fps and sports games at launch and not many cared about blue ray at the time.