04-17-12: MapmanSame here. I don't see any reason to be surprised.
Doesn't register on the goofy scale for me.
One suggestion I would make, though, if you haven't already done it, is that you go back and forth a couple of times between the new arrangement and the Rockefellers to confirm that your findings are repeatable. That would rule out the possibility of extraneous variables such as improved contact that might have resulted from scraping away of oxidation when you changed cables, or unrelated things such as changes in AC line noise or voltage.
Regards,
-- Al