This latest interpretation (on the attached article) seems to suggest the patch on day 1 will address the install bug of lower res textures?
http://www.gamebandits.com/news/the-elder-scrolls-5-skyrim-xbox-360-will-be-default-low-res-21451/


Bethesda knows off this and will most definitely fix it soon enough
good thing its not a bug that limits the gameplay.
And I read somewhere that some guy figured out what the problem was and that is was possible to patch. Give it a few days and its sure to be in order 