Nice video I just came across and hadn't seen before. Shows the focus group and field testing by Atari. AD was the subject at the moment and the guy at 3.10 nails it
http://youtu.be/Uf-vKZrQbaII bet Atari released the easier ROM version after this....which still gets hard too quickly IMHO.
I love the blue overlay and the 3D set-up of the whole screen area. Maybe the best one ever.