is 6 months long enough? I've probably spent 50+ hours alone trying to troubleshoot the texture bug with NO luck at all.
Then is quiet possibly a system problem on your end, though people are never willing to accept that fact im experience. If the texturing "issue" was widespread universal problem everyone would be having it. Though we obviously are not all having it, so its not a universal error indicating its a system based problem, imo in reading and displaying the disc or HDD data.
Skyrim is known to make extensive usage of game-caching techniques, and that itself takes up a LOT of hdd space. Much more than people actually realise. One article even suggested that gamers should have over 10gb of free HDD space for Skyrim's game cache alone. I have a 3 year old 360 elite with the 120gb HDD, and all games I play are installed to the HDD and up to date. I personally always have 20gb+ of space on my 360 hdd and have never had issues with textures in this game post 1.2 patch.
On top of that Skyrim uses a new disc format for 360 that may cause some issues for certain types of optical drives in the 360, particularly older models or ones that may be on the verge of failure or just generally at reduced performance from age/usage.
And as a final note; the 360 textures are never going to look as good as the PC versions, which is what almost all the screenshots you see are from. So don't use someone elses screenshots as a comparison, unless its specifically from a 360 with a capture card. And some textures in the game are always on the low scale because they dont show a high res version for performance reasons, or if the base texture is a "universal" one (ie distant landscape terrain).