Downflow VS Crossflow Radiators

My understanding is that a crossflow radiator causes the coolant to take more time to reach the bottom, therefore exposing it to more time in the airflow of the cooling fins.

The design of the crossflow on my Dakota perplexes me because the outlet is almost 1/2 way up the core, causing quite a bit of water to remain in the radiator when draining it to do work.

Why?