Edit: I meant to thank you, Furby, for posting this. It's a good heads up to watch your sodium... MSN Health's articles are good for the casual user, but I thought I'd present some (hee hee) food for thought.
The thing is, this kind of thing falls under what Cookie Monster* would now call a "sometimes food". Like #20, right there on top, "Saltiest Side Dish" ... yeah, it's horrendously, insanely salty, but you don't eat stuff like that every day. Diet soda and bottled water are notorious for being hidden sources of massive amounts of sodium as well. It's why you're supposed to have a balanced, varied diet of largely home-made and fresh stuff, so you know what goes into it, and there are as few preservatives as possible... and you save the salty pork from IHOP or Waffle House for special occasions.
Not to mention that all this stuff is from chains. Hardee's, Arby's, Macaroni Grill, PF Chang's... and chain restaurants often ship their foods from a few chosen production plants to their branches, which requires a lot of preservatives as well as quick shipping ... and guess what is one of the most common preservatives? Ever heard of salting pork or beef to preserve it?
Additionally, you have that the 6,700 mg of sodium is probably what's contained in a whole entree, and I can never finish a whole entree at a restaurant... and I don't know many who can. Usually I split with someone else, or I stick with an appetizer... As a kid I was given a rule of thumb to avoid portions larger than my fist, and nothing larger than my two smallest fingers if I want to try 'everything' (at a buffet or potluck or whatever). I think some weight management company has picked up this old adage now (might be Weight Watchers) and it's true. I guarantee you a portion the size of my fist does not have over 6,000 mg Na in there... demi-glace or not.
And it sounds yummy. Mmmm, portobellos.
* Alas, Cookie, I mourn for your cookie-devouring ways, but understand that your producers and writers are bending you over offstage and raping you... I know this because my childhood is the one in line in front of you. ;_;