Yes, there seems to be two display panels on the Macbook Air, the LG and the Samsung. From the spreadsheet, everybody with a 13" i7 had an LG panel except one or two people who had a Samsung panel.
According to the Anandtech review the difference between panels is not very noticeable, there's only a slight difference with viewing angles, but I wouldn't say it's a deal breaker.
Here's the review of an 11", but the panel "lottery" is explained, you can also find a link there to the SSD review:
http://www.anandtech.com/show/4554/apples-11inch-macbook-air-core-i7-18ghz-review-update
According to the Anandtech review the difference between panels is not very noticeable, there's only a slight difference with viewing angles, but I wouldn't say it's a deal breaker.
Here's the review of an 11", but the panel "lottery" is explained, you can also find a link there to the SSD review:
http://www.anandtech.com/show/4554/apples-11inch-macbook-air-core-i7-18ghz-review-update