I think you need to re-read the thread. He says he's seen it, you talk about how everyone does them that way and give examples, but you're thinking of the standard IC-Rad-Engine format, not what he's talking about, Rad-IC-Engine.
I'd like to see where you've seen it mounted between the engine and radiator in a standard format.
The engine gives off raw heat going a whole 3 inches to your metal intercooler. You're getting minimal airflow after the radiator. Just having air moving around doesn't mean you're getting proper flow or that it's effective. Take the EJ-style TMIC. It gets hot as hell from the engine, but it's designed so that the air is FORCED through it by sealing to the hood scoop. Direct air.
It's the same as if you leave a short ram in the engine bay. It's going to get heat soaked.
OP- If you want the shortest piping, lose the AC in favor of the PBM High-mount kit. The benefits from the extra few inches of shorter piping compared to the PBM (Yes, only a few inches) is nowhere near the consequences of running it inside the engine bay.
PBM High-Mount:
POWERED BY MAX: ????? Cooling