It's funny that you posted this. I had done the same thing but not nearly as detailed. However my own results back up yours. Airmagnet works extremely well relative to NS.. but, NS is free and does GPS location data which makes it invaluable over AM for certain tasks. I use them both for what they are each good at.
Sidebar: my own testing was done on an iPAQ 3835 with the AM Cisco 352 card and Orinoco Gold card. The AM does not support an external antenna without hacking the tweaked card. Although I am in talks with the engineers about offering that as an option.
For those who want to see AM.. go to this link. I made up a couple of AVIs with a voice over. The first link is the direct link and the second is the wireless page that has the 2nd link.
http://www.packetattack.com/airmag/a...ening_wmv.html
http://www.packetattack.com/wireless.html
We have links to several wireless sniffers. I will have the NAI wireless sniffer in my hands on friday and will be able to report on that in a few days.
Wy-