It starts off with "The egg sets the baseline unit for all other ingredients; 1 egg mass = 1 unit." and

    1   egg
    2   white sugar
    3   brown sugar
    4   AP flour
    e   unsalted butter  [2.72]
    π   chocolate chips  [3.14]

but then it continues on with this usage of absolute volume measurements:

    1/2 tsp baking soda
    3/4 tsp kosher salt
    1   tsp vanilla extract*

Is it really true that cookies made with hummingbird eggs need a much larger portion of those ingredients than cookies make with ostrich eggs?