I'm a happy and proud owner of two Aeratron fans. My experience is vastly different from the OP.
I have a 60" and 48", and they both live up to my expectations. Knowing that it's a DC motor fan, I understood that the blades move slower than a regular AC motor fan (like most KDKs). Have you tried Haiku? It's pretty similar in terms of airflow - I think Aeratron is slightly stronger at full speed, but that's just my opinion. I have the 60" in my living room, about 5-6 meters away from my dining table and I'm feeling the wind from the fan.
At lowest two speeds, you can't feel much, but that's more for ventilation or if you are just under the fan (like in the bedroom).
Also worth noting that while researching to buy a Haiku or Aeratron, I found out that Elmark sells fake Aeratron (as stated on Aeratron's official site: http://aeratron.com/distributors/) I'm not sure if you bought it from Aerahaus? I dealt with Aaron and he was very responsive and reliable - one of my fans had a very faint noise after installation and he came down personally with his installer to make sure that the replacement one was noise-free!