It's news to me, I've not been told anything along those lines by the factory.

I have just been playing with the video camera and editing software while out check running a bunch of engines

http://www.putfile.com/robrow

What surprised me about the Super Bee was the low residual thrust at idle for this size of engine and the absence of any compressor 'whistle' noises. Usually I have found very small engines to have still quite high idle thrust, even as much as 40%-50% of their max rating.

Rob.