Hola Sherri,

Yes, exactly. Although there is a number after que, it is expressing a comparison. He is comparing that man's eating to that of two men together. See how this would not work if we change the que for a "de":

"Es muy gordo; come más de dos hombres ordinarios." 

This wouldn't make sense because it'd mean that he eats more than two men. 

This other one would make for sense with "de":

"Es muy gordo; come más de dos kilos de patatas fritas cada semana."

(He is very fat; he eats more than 2 kilos of fries every week.)

I understand though, that finding this kind of sentence you found could be a bit confusing so I will add a note to the lesson.

I hope that helps.

Un saludo 

Inma