That's just in a single fan open air scenario, though. When you have them mounted in the shroud, the separating vanes will increase their efficiency and effective CFM. They could be putting out as much as 900-1000 CFM each.
I have that exact setup with the first fan on the low stage trigger and the other two on the second stage. Once the engine is up to temp, all three are putting out 100%, so the entire width of the radiator is being cooled at all times as opposed to just the area in front of the mech fan. Sure, the factory setup might put out higher total CFM, but that's only during peak demand which is temporary, unless there's something wrong with the cooling system. Three e-fans should be able to provide nominal cooling just as well if not better if properly set up.
My temp stays right around 200 and just shy of 210 with the A/C on in 90 degree weather, and even off-roading all day it'll just sit at 200 and not even move. Stock spec pump and t-stat, but I did put in a 3-row CSF after my factory rad cracked, and I've got hood vents installed.
