Earlier quoted context omitted.
Why should it depend on the pasta type? 100g penne is same as any other type.
Curlier pastas carry more sauce into your mouth so when you eat 100g of fusilli you're eating more total food than 100g of spaghetti.
Not sure I agree. In my house, if we make a sauce regardless of pasta served with it, it will be entirely eaten. Then the plates licked.
I agree that pasta shapes are required for certain dishes.