Gentlemen: I have a 2009 LE and it has this ....."unobtanium" grocery bag device in it. To be truthful, the back comes covered with a custom rubber covering that can be taken in and out, which is then covered by a custom cut mat that matches the carpeting and by the time you have all those things in place, it becomes a PIA to have to lift up all those covers just to have a place to put your grocery bags.
Although I guess I'm fortunate (?) in that I have that much sought after doo-dad, it appears that its attraction seems to come more from the fact that it's not readily available as opposed to how really useful it is. Most of the time I end up putting the grocery bags on the back seat...or if the seats are down accomodate the dog, I set them up against the backrest of the front seats....or when alone, I set the bags on the floor of the front seat and on the seat itself.
I truthfully believe that ....as I said before, it's the unaviailability of the accessory that seems to draw so much attention. It's one of those "I just gotsta' have one" that seems to draw the crowd.