I don't stretch in the mornings, but if my legs are sore at night I will do a little strecthing then. But nothing serious.
I've traveled with people who were crazy stretchers. They wouldn't get on the bike in the morning until they had stretched for 10 minutes and as soon as they pulled into camp at night they would get out there little sleep mats and stretch again.
I just don't like people looking at me when I'm stretching. I think it's kind of funny to watch someone stretch.