Nope. The original article states that the husband went up 12 times. There was no mention of how many servings his wife ate. It's also quite possible that a least a couple of those trips were for his wife.
The article also states that the couple has 2 children, so it may be that one or two trips were to get more for one of their children.
I often do that for my girls...go back to get more for them.
Personally, I think the manager was out of line and that the negative publicity will wind up costing them far more than this gentleman was costing them in meat. I know if that restaurant was in my town, I wouldn't be terribly inclined to give them my business after reading that article.