The current framerate (lag) issue that is hounding the PS3 version of Skyrim has users split. The reason for this is because some are still experiencing the problems after the update, while others are not. We have to wonder what is so different from one user to the next, and it cannot be the save file size, as there are inconstancies there as well.
Some users have said that they have not had many issues with framerate (lag) but you can tell that it exists. In other cases there are no such problems, but then again Skyrim has been known to crash on them. There are occasions where the game becomes unplayable, and it is times like this where those with the PC or even the Xbox 360 version will have a huge grin on their faces.

The framerate (lag) is not as bad as it was before the patch, in some cases it was unplayable, but now the issue is sporadic. However, we you do get affected by the issue it will usually come at the worst possible moment, the only way to resolve things is with a restart.
A worrying article on Attack of the Fanboy has been looking into what a developer for Fallout: New Vegas was saying about Skyrim, where he said these issue that have been dogging the PlayStation 3 might not be avoidable, which is due to how the hardware works with the software.
It is said that the main cause is with the engine, and the solution is not a simple one, as it’s all to do with how the game data gets stored. The reason why the problem affects the PS3 more than the Xbox 360 or PC is due to the “divided memory pool.” Skyrim has yet to comment on these findings.
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Skyrim 1.2 patch notes: PC/Xbox 360 dated