Interconnect Break In?

Gentlemen there are alot of great answers, GoodLuck.

my RECENT experience - Bought new D'Agostino amps/preamp and Cardas (Clear Beyond) interconnect cables (pre-amp to amp, phono pre-amp to pre amp. Instructions in Cardas box clearly state ""through use (after 150-200 hours) the dielectric materials will build up a uniform charge.  As this happens, the sound & spatial imaging will improve, and details will become more clear."  I played a record with no break in and the sound was noticeably less precise than my old gear (as a note - this was with a record I know by heart.)  I plugged new phono preamp to preamp cable into my tuner to break in, then ran system (at low volume level) for 200 hours (continually for over a week.)  Replugged phono-preamp cable back into phono preamp.  Then I tried the same record again.  It sounded like the world changed.  Depth, detail, bass tightness all improved dramatically.  I am a believer!

"Instructions in Cardas box clearly state ""through use (after 150-200 hours) the dielectric materials will build up a uniform charge” 

-that only can be true for cheap dielectric, which cures (hardens) with time, faster at high temperatures.. audio signals are low level AC signals, not affecting dielectric at all. more expensive dielectrics used for stable testing results use time-stable dielectrics (Polytetrafluoroethylene  PTFE, Gore cables, etc).