Patch attached. This patch does NOT change the default; stats are still opt-out. But it makes it easier for users to start specifying what they want or not explicitly, or to rely on the defaults if they prefer.
Note that the patch would mean we go from 2 options in v17: --{schema|data}-only
to 9 options in v18: --{with|no}-{schema|data|stats} and --{schema|data|stats}-only
I suggest we adjust the options now with something resembling the attached patch and decide on changing the default sometime during beta.
Patch is straightforward. Comments are very clear as are docs. I can't see anything that needs to be changed.