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.