shutter life expectancy seems to be highly speculative and perhaps influenced by the company trying to avoid possible warranty costs.
Here's a database of users who have provided their results for the 5D MkII. I just picked that because it seemed to have been a popular camera and was a FF, no MF data is provided in the database:
canon eos 5dmkii | Camera Shutter Life Database
According to that data, the AVERAGE shutter actuations after a failure was about 380,000 for a 5D Mkii
For a Nikon D3, average failure was after 663,000 actuations,
The problem with that reporting, i would suspect, is that many people are not reporting, except if they have a failure, and many others are selling cameras, etc.