WHAT? You are on PS3, is that right?
Nope, I'm on PC. Wish I could say how long it's been since I cleared out Helgen the first time...certainly more than 30 in-game days, at least.
FWIW, the respawn I saw in Helgen was only partial as far as I could tell. Only one bandit respawned...or maybe it was one I somehow missed on my first pass through, although that seems unlikely. (I'm usually very thorough.) I didn't think to check containers, etc. to see if they'd respawned as well. The mead however did respawn, along with random, "loose" loot scattered around on the tables. Coin purse, a potion or two, etc. There were five bottles on the floor and three bottles (drank the other two

) I'd already collected ages ago, sitting in a chest back in Breezehome.
Could be a bug. Could be weirdness caused by various patches going in between when I first picked up that mead and now. (As I said, it was either on 1.3 or 1.4...and the game is now on 1.5; patching has caused some hinky respawn and scripting glitches before, although they usually sort themselves after 72 in-game hours.) Or it could be that the wikis are wrong and those bottles are set to respawn along with the rest of the "loose" loot in Helgen.
If I had the energy I'd download the CK and nose around to see if I could see if they're indeed flagged to respawn. But I'm half-asleep at the keyboard, so that's not going to happen.

Maybe somebody who already has it installed would be willing to take a look.
Edit: On checking the UESPwiki, it looks like only Helgen Keep, which is an interior cell, has been specifically tested and verified for safe storage/no respawning containers. The exterior Helgen cell hasn't been verified in the same way as far as I can tell. It's possible someone mistakenly thought the exterior was set the same way as Helgen Keep when it really isn't.