So does the Blood Elf starting zonechronologically take place at the start of Cataclysm expansion or when Cataclysm is over?

So initially, I was under the impression Blood Elf starting area took place chronologically at the start of TBC, like the Draenei starting zone. But when I created a blood elf character, the narration of the zone says this...

"The past few years have seen unprecedented changes within the eternal land of Quel'Thalas. The blood elves, following the will of their crazed leader Kael'thas Sunstrider channeled dangerous chaotic magics to transform their sacred Sunwell into a gateway of unspeakable evil. While Kael'thas and his demonic masters were eventually defeated, a different kind of transformation occured within the Sunwell itself. As a dying Naaru sacrificed its life essence to reignite the Sunwell into a fount of holy energy. Now, the blood elf Regent Lor'themar Theoron sees a new hope on the horizon for his people. Over time, the Sunwell's light could cure the blood elves of their cursed state, but many still cling to the arcane powers they procured and are hesitant to relinquish them. As one of the remaining blood elves, you must fight to protect Quel'Thalas and help redeem the soul of your ancient people."

In other words, TBC seems to have already happened. After doing some searching, wowhead states that the Blood Elf starting zone story was updated during cataclysm.

I like to have my characters play from the chronological entry point of their starting area. So in this case, would my new blood elf character start in the starting areas and then do Cataclysm content? Or has cataclysm chronologically concluded and I move immediately to MoP?