First impressions: wow, that AG coating is really, really awful. You can see the graininess on all but the darkest colors... This alone might be enough to send it back.
I noticed this at first too and mentioned it in my NE review, it is a bit of a shock because the pixel pitch is so fine also. I think for text its always going to be somewhat more noticeable but I would still give it about a week before you make a decision on it, this panel and screen definitely need some time to warm up. I also had a pretty annoying backlight "oval" that almost had me send it back but it has since subsided nearly completely, not dissimilar to the initial problems with the Asus VG278H. Given some of the stories I have heard about much worst panels (2-4 dead pixels) I really consider myself lucky.
In the end I think its a great panel, but I also think subsequent revisions or versions will be improved. I think the biggest gripe people are having is for an $800 monitor, they expect it to be perfect, but having been in the market for high-end displays in the past, it's always been a panel lottery to some extent and at the end of the day, its just a matter of how many warts you can live with and how much hassle you are willing to go through to get the perfect one while getting one that is worst.