Why jquery mobile in core?
Could you please explain why did the jQuery development team decide to include jquery mobile in the core? This means that mobile browsers would have to download useless bits, such as Sizzle and browser-specific hacks (for example, IE). I suppose, jquery.mobile.js would have a size of about 20kb instead of 71 if the core library was excluded. Downloading the extra 50k may take several seconds, even on HSDPA.
Perhaps you are thinking that the "big" website and the mobile version should be the same, using only CSS to target the specific platform?