Try downloading the performance mod and updating all your drivers oh and disable vsync through the skyrim.ini, disable antialiasing too.
If you have a hard drive with enough space on Xbox 360 or pc, install it to your hard drive and this makes load times shorter as well.
Obtain a copy of it legally.
I do believe that it is the game because it lags on all systems.
The term "Lag" is used when internet interference occurs and your connection to a server decreases and it causes skipping and cutting in in-game-actions. Skyrim is single player so there is no lag in Skyrim. If your having visual skipping in Skyrim then it is more then likely your Frame Rate dropping which means your graphics card of RAM cannot handle the game on your current graphics settings. Go to your visual settings and turn down your graphics settings a little and if this doesn't solve the problem then your computer cannot handle Skyrim's graphics.
Skyrim is on PC, PS3 and Xbox360.
Yes, Skyrim will be out for the PC, 11/11/11 is the release date.
Skyrim is only on XBox360 , PS3 and PC.
Skyrim DLC for PC is out as of 8/2/2012 in the Steam Store.
You can fix Skyrim on steam by removing all mods and Workshop content from your game before calling Skyrim support.
Yes. Skyrim is also out for PS3 and PC.
You cannot play the PC version of Skyrim on a X-Box 360.
You can't mod the console versions of Skyrim, they are exclusive to the PC version.
Mature
If your copy of L4D lags in Singleplayer, then yes, TES:V Skyrim will lag profusely. If L4D lags in Multiplayer, then it just may be your connection to the internet.