One of my 150000 exposure (expected life) 7D cameas shows a shutter failure now and then (Error 30). It's done about 35000 exposures.
We should remember that the live expectancy numbers associated with camera shutters etc. are based on testing which means that some samples fail sooner and some fail later.
That is also true in the real world. I sold a 5DII with over 170K clicks on the shutter.
I had sent the camera to CPS and asked them to replace the shutter. They tested the camera, said everything was fine and sent it back. When I called to ask why they had not replaced the shutter, they said policy was not to replace functioning components.