Yeah that would likely be the issue. Todays server processors have many cores, if you want your server application to get a speed boost it is time you talk to your engineers working on facebook to start optimizing facebook for many processors. Of course they need to make sure any API's and server software they use is multi-core friendly too. Maybe they can start laying the blame somewhere else.Maybe he should try optimizing his applications for the microarcitecture instead of expecting the microarchitecture be designed to fit his needs perfectly.
I'd also like to point out when a company, for example, says something is up to 50% more efficient, they mean it's up to 50% more efficient."The performance gains they're touting in the press, we're not seeing in our applications"