Different camera bodies have different warranties on the shutter. It's not the shutter you are really worried about, but the relative wear and tear on all parts of the camera. 10,000 or less activations would be low for any camera body. 50k would not be a large amount for a D3 used by a pro in their job, but it would be a relatively large amount for a 5 year old D70.
The other way to look at this is based on the number of activations you expect to put on the camera. If you tend to only shoot 10,000 images a year or less, you aren't likely to wear out a camera within its useful life.