Default Greetings not set when importing new contacts - v3.1 beta 5

Should greetings field be set with default greetings (i.e. Email Greeting, Postal Greeting, Addressee) when importing new contacts? I'm testing import of new contacts, and in v3.1 beta, the greetings fields are not set after I import new contacts. I Don't want to run the script to update greetings, because I will then blast out any greetings previously set for existing contacts.

Is this a bug, or will it be required /suggested that folks also import greeting fields with new contacts?

UPDATE: The UpdateGreeting.php script has been modified for 3.1 so that the default behavior is to only set greetings values for contacts who don't already have a value set (i.e. it does not over-write greetings that have already been set for existing contacts). You can over-ride this behavior by including force=1 in the parameters when invoking the script. Hence, you can safely run UpdateGreeting,php after imports.