Most "Knowledgable" audiophiles, manufacturers and/or reviewers say the shorter the speaker cable the better. Use longer interconnects if necessary but shorter speaker cables. It has been contended that this will impart less of the wires sound and/or other attributes on the reproduced signal. The speaker cables must carry higher current and voltage than interconnects. (Another reason for biwiring)
I personally keep ALL cables as short as possible. With all this said, I have found that longer interconnects seem to muck up sound worse than longer speaker cables. I'm sure this would be somewhat system dependent(amp). However, since the interconnect carries very small signals, I could see a good reason, with consideration to impedance and capacitance, to keep them short and out of harms way, so to speak.
This Mapleshade guy is either after publicity or he is a true visionary. Guess everyone will have to make up their own minds on that point. I do find his speaker and chair placement ideas questionable. It sure doesn't work in my room.