Are the respawn rates working as intended?

[Jaixx]

Level 40 currently. I've noticed that as I continue questing, killing mobs and such, the mobs usually i killed usually spawn quite quickly, around ~~3-5 mins.
according to wowwiki "Most normal mobs usually are on a 15 minute respawn timer." Is this information for the latest expansion, or does this not apply to TBC?

When im questing, I usually get trapped because the mobs i killed respawn before im done, and im surrounded by mobs.

[Swarmer]

Its cause medivh is/was a direct copy of Outland and they had to put respawn rates very hight there cause a lot of people started questing.

It was way worste at the start we couldnt even clear a house without mobs respawning on the first floor. They raised the respawn rate some time ago to the time that it is now. I dont think they plan to raise it even higher tho. Better quest with someone if you need to clear caves and stuff.

[tektonik]

Some mobs respawn too low, some respawn fast. Just how it is. On average it is about normal.