Years ago I had that Mr. Clean car wash system that used de-ionized water for a spotless rinse (a.k.a. no drying required). Not quite as intense as what you're talking about, but the thing I took away from it was that it took just as long to hose down every inch of the car with the de-ionized water as it did to just dry it. In the end, I just went back to drying it by hand.
Again, that's with the cheap Mr. Clean kit. I have no idea how that compares to the beefy kits you're talking about.
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Current Ride: 2012 Nissan 370Z NISMO #0389
Mods: Fast Intentions Resonated Test Pipes and TDX Exhaust with 18" Resonators (#1054), K&N Drop-Ins, GTR Start Button
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