Samsung are supposed to be scheduling JB for my S3 after the Nexus. I've noticed that now that I have over 80 apps, ICS is delayed somewhat in responding. I hope the mods Google did to Vsync through Project Butter will diminish that.
That's why i'll never buy me a device again which is not from google. Few years ago i had a HTC Hero and hated that the updates came with so much delay. (Also HTC become worse in producing devices). If you're a custom-rom nerd then i would ever buy a google device.
ya i just got my first android device the htc one x i know i know htc i honestly don't have a problem with them though just unlocked the boot loader and got cm10 never been happier snappy as hell and a beautiful screen!