Report time to first edit as ttfe
The time that elapses between a user creating an account and that same user
making her first edit is a good indicator of how good a job we are doing at
being encouraging, welcoming and comprehensible to new users.
One common web performance metric is "TTFB", or time-to-first-byte. This, then,
is "TTFE", or time-to-first-edit.