Here is my experience: My cables were originally soft and supple. But, unfortunately, they got less and less so over the months that I had the IE800.
I just got them replaced under warranty for this reason. Replacement pair is again soft and flexible. I am just afraid that it will not last.
On the one hand, I love the cable. It seems very strong and looks kinda cool.
On the other hand, I HATE the cable. It is too short after the split and seems to harden...