Ok, I was finally able to put the Bybee Nitro power cord in my system last night and do a brief listen.  It replaced a Type 2 power cord on my balanced power supply (my entire system is plugged into it).  My balanced power supply was also plugged into a Bolder Quantum bybee power strip, which has also now been replaced.  In fact, where the Bybee Nitro PC is better is that I have bybees on both the Live and Neutral lines, so regardless of plug polarity of anything in my system, it is getting bybee-purified power. 
Anyway, after putting in the Bybee Nitro PC, bass response seemed to be lower and tighter and generally more percussive and fast.  Soundstage seemed to be a bit deeper (some things really did seem to extend far back) I noticed some more details and nuances in, for example, the voice of Norah Jones, the violin played in The Corrs, etc.  Overall, the music seemed to flow a bit better, which would indicate an improvement in coherency. 
I need to listen more, particularly when my system is fully warmed up.  It was unplugged for about 15 minutes while I was swapping in the Bybee Nitro PC and I only listened to it for about 15 minutes afterwards.  Its been on standby since last night and I'll switch the tube preamp to Operate a half hour before I listen so that all the tubes are nice and toasty.