Does This Debunk the "Coolant Can Flow Through the Radiator Too Fast" Idea???

Here's a graph of a given automotive radiator application that describes the rate of heat transfer as a function of coolant flow at a few different air speeds. The takeaway is - flow is your friend when it comes to improving heat transfer rate. Graphs like this are all over the net. I doubt you'll find one that shows heat transfer rate decreasing as coolant flow rate increases, yet the myth just won't die.