As promised, I tested it and wow. I wasted half a roll because it kept exceeding my test parameters. 3 videos in, I finally got it. At 135mm3/s i started seeing issues in the corners of the middle row, but I think it could go all the way to 150mm3/s with more cooling fan. It melts so easy that the extruder had no problems. Now the lower suggested nozzle temp makes sense. The Elegoo Rapid PETG tapped out at 112mm3/s, so it is not the same stuff. It also wont be a limiting factor for the bambu printers.
Found one downside. Not so great as a support material for pla. Because of the lower melting poin I assume
I’m also loving the PETG-HF. I just printed a 6 bay NAS case on my X1C using PETG-HF (gray) for the exterior and EleGoo PETG-Rapid (black) for the interior and back. I really like how it came out.