This reads that it doesnt take consideration if its incomplete or not, which is kindof stupid. I could be reading it wrong but that is all it shows
What is a big-time throw?
Throws graded at the higher end of PFF's scale (+1.0, +1.5, and +2.0) are categorized as big-time throws.
A big-time throw is a high-difficulty, high-value pass. They are characterized by excellent ball placement and timing, typically on deeper passes or into tight windows.
These throws can also occur under challenging conditions, such as when a quarterback is under heavy pressure but converts a potential negative into a positive play. Other examples include tight-window throws in the red zone, where space is limited, or perfectly placed 50-yard shots down the field.