Last night, at my friend's house (first time playing on 360 offline), I went through and did some quests, nothing was wrong with the game. all was good in the world. I got home and went online and I noticed a small bit of lag any time my inventory screen went up; while enchanting, storing things in my house, equipping, alchemy, etc. Even using the quick equip screen. I dismissed it, thought it was no big deal, though quite weird. I went to sleep and woke up this morning, and immediately turned back to Skyrim. I downloaded the patch, and loaded my save game in Whiterun. This is where the big problems began. I was getting about 5-10 second lag delays any time I sold/bought/stored/recovered any item from shops or barrels/chests, and opening barrels/chests took about 5 seconds to load the contents. I dealt with it, all the while getting more and more infuriated with the need to wait to get my Quest on. I deleted a bunch of my old save files to see if clearing up data would help, but it didn't.
So I continued, and the load screens took a bit longer to go through; about 50% longer than usual. But I dealt with it, because I just wanted to keep playing. I did some quests for the Dark Brotherhood, and then went back and started on "Diplomatic Immunity." This is where I began to rage even harder. The item lag stayed about 5-10 seconds, but when I finished the quest and fast travelled back to Riverwood, the loading screen took about 5 minutes. Then when I went in the inn to meet with the contact to get my stuff back and finish the quest line, opening the door triggered a FORTY MINUTE LONG LOAD SCREEN. Needless to say, I was not impressed. then when I went to the chest to get my stuff back and pressed the button to empty the contents, it loaded for about twenty minutes, then froze (you can tell the difference because when you press the Xbox menu button, it makes a sound). So I tried again, and again, and again. Each time, same results, making the game unplayable for me at this time.
Now as I said, I don't know if these issues are bugs, if I'm the only one experiencing them, or if the Night Mother is cursing me for T-bagging Cicero before killing him. Hell, maybe it's even a corrupt save (though I doubt it). Any light on the subject would be helpful and appreciated. Thanks for listening.