The DVCS Myth

This idea only rings true if your team is reliant on a single infrastructure service you don't control.

If you maintain mirrors of your repos on multiple servers you control, or on multiple services run by others (eg GitHub + BitBucket) there is no issue when one suffers an outage.

Hell, git's built-in pull-request functionality works over email and doesn't require any specific git server.

I have issues with git specifically (I find mercurial is a better tool for most tasks) but GitHub/BitBucket/etc are not the definition of what dvcs is about.