Great deal. Ordered on 26th, delivered yesterday (28th). Monitor makes everything from games to even scrolling in browser buttery smooth. Stand is extremely sturdy and goes nice and high although the lighting in the stand is rather pointless and alienware/dell software is more of a hassle than it is worth. Colours are great and vibrant and calibration with a Spyder shows almost no difference to my eyes so great factory calibration to boot.
I order this monitor the day it was released and it came 2 days later, I'd say you were unlucky.
Alienware products are way overpriced for the quality they provide
It appears the difference is the colour: AW2521HFL - Lunar Light (White) AW2521HF - Dark Side of the Moon (Black)