Do Interconnects need to "warm up"?

My system is left on most of the time and sometimes on standby. I noticed that when I first start to listen the sound is a bit bright. All of my IC's are balanced and single ended Silver Streaks, the components are Krell. It seems to take almost a half hour before the system seems to calm down where it then sounds smooth and sweet. So I was wondering, is it possible that IC's may need to warm up as some equipment does - your thoughts? Thanks!