This is my experience except for the Whiterun part and with the exception of the tundra. Most dungeons and interiors are fine, Whiterun is still okay, for me (although not nearly as smooth as it was when I first started the game, to my disappointment), and the Tundra is still good, but everywhere else is crap... seemingly never getting above 25 fps. I hate fighting dragons and trying to enjoy the beautiful gameworld under these conditions and I can guarantee the 360 version isn't having these issues. Maybe they shouldn't be so adamant on forcing V-sync at all times on the PS3 version and should do what they're doing with the 360 version... allowing V-sync to selectively disable itself in order to maintain a smoother framerate.
I know, fighting dragons is bad. You're right, it's beautiful, we just can't experience it the way we should be able to. Well unless they fix it, which I honestly have no idea on whether or not they will. The 360 doesn't, they only have the texture issue which truthfully I'm not entirely sure is all about, but I'm pretty sure they can still play the game fine. What makes me so mad is that the fact that the 360 version is better. Yes, the 360 has a bigger fanbase, I'm not afraid to admit that. I personally chose the ps3 because all my friends have one, and so far, i've been satisfied. I don't like most of the 360 exclusives (Mass effect I, Halo, Gears of War, I know, I'm crazy), and the ps3 hardware is better, considering I've had my ps3 for over a year now and I haven't had to send it in or anything. It's unfair and wrong to make a game that works great on one system, and that barely works on another. Just because less people own, or at least play on, a ps3 doesn't mean we don't deserve the same quality. I hate when people argue about which system's better-they each have their advantages and disadvantages. You chose the system you wanted because you preferred it, it doesn't make it better. We shouldn't have to buy an Xbox to play an amazing game and have better quality games because we prefer to have a ps3. Plus I don't really want to and can't spend another $300 on a gaming console right now.