Is Xbox 360 Dominating the Online Experience?

Over the past few days there have been multiple comments being made about the superiority of the Xbox 360's Xbox Live Service and its superiority to the PS3. It's no secret that this generation is the online and connected generation for consoles. Many fans of the PS3 mock the Xbox 360's paid service Xbox Live, because of the fact that Playstation Network is free. But as the old saying goes…You get what you pay for.
Comments like those from Chet Falisek the Left 4 Dead project lead stating " the 360 is head and shoulders above the PS3? and that it's multiplayer-focused Left 4 Dead franchise isn't headed to Ps3 , lead me to believe that while you may not see exactly what you are paying for in your Xbox Live subscription per say. You do gain the benefits of a subscription based service that is constantly growing and evolving to enhance the community aspects of games. Apparently many designers are taking that into consideration when deciding on whether or not they want to publish on both the PS3 and Xbox 360.