Theming date field in views field template

Hello
I have a view of nodes, with a date field. I have set the format of that date field to 'default', but would like to set it to a different format for specific node types.

So I hoped to do that in the views template (views-view-field--myview--field-date.tpl.php), and I started out with the code below:

// $Id: views-view-field.tpl.php,v 1.1 2008/05/16 22:22:32 merlinofchaos Exp $
 /**
  * This template is used to print a single field in a view. It is not
  * actually used in default Views, as this is registered as a theme
  * function which has better performance. For single overrides, the
  * template is perfectly okay.
  *
  * Variables available:
  * - $view: The view object
  * - $field: The field handler object that can process the input
  * - $row: The raw SQL result that can be used
  * - $output: The processed output that will normally be used.
  *
  * When fetching output from the $row, this construct should be used:
  * $data = $row->{$field->field_alias}
  *
  * The above will guarantee that you'll always get the correct data,
  * regardless of any changes in the aliasing that might happen if
  * the view is modified.
  */

  $data = $row->{$field->field_alias} ;
  print content_format('field_date', $data, 'mycustomformat') ; 

But this doesn't work, it gives me the first of January 2009 on all dates, while $data returns values such as: 2005-07-01T00:00:00

How should I get the date field from the view in this template?

Thanks
Klaas