While the PS3 has a soft spot in my heart (free online multiplayer!) I can't help but wonder if the subpar launch gave Microsoft Xbox a leg in the race where otherwise the Xbox 360 might have been the last console in their lineup.
Probably very dependent on location and your friend group. In my case, everyone I knew had a PS3 and I was pretty much the only one with an Xbox360. Only some had a Wii.