I've been looking at some of the videos of the Model S, and have started to be concerned about the amount of legroom that there will be for passengers in the back seat. The video that has me the most concerned is: http://www.youtube.com/watch?v=T_9JUvb7eYU (at about 30 seconds into the video, it shows a shot of the back seat, and it looks really tight back there). I know that Tesla hasn't announced specs (so we don't have any official answers to go by), and the prototypes aren't built on the chassis that the Model S will be, but that back seat really doesn't look like adults could be comfortable in there. Does anyone have any information about whether my concerns are well grounded or not??