Sadly, I can't comment on the article due to my incompentence at bypassing paywalls. That said, I'm a bit bewildered at the title. My perception of the value on most breakfast buffets is ridiculously low.

Unless I'm traveling with the whole family. Then the walk up service as everyone is getting ready is the main value point.

So, I presume that is the point they underline? It isn't just that it is saving some money on food. It is the value of having a place in building to get food as you settle in.