Why did I only discover this lately?
Because the archetype:create was deprecated in Maven 3.0.5 and you should use the archetype:generate from now on. A bit odd to do this in a .0.5 release. I must be missing something about the reasoning behind this change.
So from now on when I need the default directory structure:
mvn archetype:generate -DgroupId=com.cinq.example -DartifactId=example1 -DinteractiveMode=false