Mike,
The config.txt file created by the RubyMX 3DWH/Sketchup exporter will place a tagline in the description stating that this is orginally a Sketchup model. I suppose the person uploading, and I'm guilty of this as well, should note the original author and include that in the description even if it means editing the config.txt at in the end.
I too find Gmax and even the original 3ds Max to be very cumbersome. Their older 3ds 4.0 for DOS had a much more intuitive interface although quite dated. If they had taken the interface from the DOS version and implemented that in the Windows-based Max, then this would have been a really nice product. I actually had a chance to use Max 1.0 just before it was released. A friend of mine worked as a freelance writer Autodesk and wrote one of the Master's series books. She compiled her copy on my computer, my brother output the films, and I did some editing and proofing. It was an awesome experience that I'll never forget.
I too have yet though to get into Blender. I have it, took a quick look at it and instantly became tired. It's typical of many open source applications. There are too many options and key strokes for the functions - not that they're not needed. It's the intereface and organization that's confusing.
I agree we have to be careful what we place in our scenes since N3V does not include a poly meter. It would be nice if there was a scene or camera view poly counter that would change color from green to red if the polylimit is too high for the hardware. So if on my own fast computer my scene counter turns red, then this definitely cause problems on lesser hardware.
John