I like big things
The size of them impresses me
Just give me plenty
Forget about the quality
And I like fast food
The burgers always taste the same
No snotty waiters,
Escargot or Beaujolais
Actually, Dennis mentions two of McDonaldization's themes in this song. "The burgers always taste the same" is a reference to predictability. "Big things," however, is calculability all the way. He just mentioned two out of the four main dimensions of McDonaldization without even trying.
The second aspect of McDonaldization is calculability. Calculability is " ... an emphasis on the quantitative aspects of products sold (portion size, cost) and service offered (the time it takes to get the product). (Page 9)"
Ritzer goes on to point out that this emphasis leads to the erroneous conclusion that more is better. If there is a lot of a product then it must be good. This is why we "super size" our "Double" Big Mac "extra" value meal. It is thought of as a better product.