all i can say is the service is good, i cancelled for summer as im not in watching movies. dont know about your specific question, but did like the service.
Netflix does not offer DVD-A rentals nor does any other place that I know of. I think since it falls into a music format it would be like them renting cds. It would be great if they did but they do have a pretty good selection of concert dvds. I usually rent the concert dvds so I will know if I would like to buy them.