That's my understanding, too. If you're not running a balanced source, preamp, and amp, then there's no benefit in running balanced in only one connection because the signal becomes single ended anyway.
So, Grant, what about the second part of of my statement? That is, that once you're running balanced from one end to the other (assuming all components are truly 'balanced'), that the difference in cables becomes far less pronounced than with single-ended options. Whereby an average pro-audio cable is not likely going to be distinguishable from a $2k vanity cable (as it may be using the single-ended option).

