Yes, good point. Facebook, Google+ and most large sites like Apple don't use responsive layout. Well, FB and G+ have something like "supplemental" layout where they display an extra Chat or Ticket blocks when there's enough space, but that's different. They still don't alter their main page layout.
Interestingly, MIcrosoft's homepage is now responsive, but in typical MS style it's the only page that's responsive - click on "Windows" and you get hard-sized full page, making see more responsive homepage as silly as it can get. Kind of remind me of their slap-on way to introduce metro on top of standard Windows interface. As Master Yoda used to say "do or do not, there's no try". MS is no Jedi.
Not sure everyone would agree with you re: apple: http://needmoredesigns.com/blog/apples-vertically-responsive-website-design/.
Also, Apple, via their developer site, has documentation that encourages developers to make adjustments that allow for more optimal viewing on an iOS device, effectively, responsive design. I would quote various documents but I fear the Apple NDS attorneys would be all over me, and know that you have access to them anyway.
But to be honest, I think Apple essentially see more has a philosophy of non-responsive design tied to a number of edicts like "no Flash", "no WAP", "no 7 inch screens"...
Interestingly, MIcrosoft's homepage is now responsive, but in typical MS style it's the only page that's responsive - click on "Windows" and you get hard-sized full page, making see more
Also, Apple, via their developer site, has documentation that encourages developers to make adjustments that allow for more optimal viewing on an iOS device, effectively, responsive design. I would quote various documents but I fear the Apple NDS attorneys would be all over me, and know that you have access to them anyway.
But to be honest, I think Apple essentially see more