Do power cords make an audible difference?

My take( having spent way to much time doing comparsions )is yes they do make a difference and sound different. As many have pointed out it is system and taste dependent. Notice I did not say better sounding. On my integrated I think the stock power cord sounds more open and smoother then my $200 very nice power cord. It makes the system sound more aggressive and the stage has more depth and images are tighter but it is a smaller stage
It makes me wonder about three things.
1) One would think most gear voiced with the stock power cord??
2) In an amp or CD player (or whatever) we have very small wires going to the amps outlet and then we put a garden hose on it for 4 feet that goes into a power condtioner to a smaller garden hose that leads to the wall outlet with 14 or 12GA wire. This make no sense to me.
3) If one has an amp that has a captive cord and one likes the amp is it a good idea to get an EIC installed on the amp to take other power cords??? As mentioned above wasn't the amp voiced with the stock power cord???
keith

Not sure about that as a rule. 10 years ago $5-$600 integrateds did not have sockets for aftermarket cords Now they all do. We are talking about the same pricthe ability to accept aftermarket cords.e points but now they suddenly have What does that say??