How to query posts from single post format on Genesis framework

The taxonomy should be post_format and term should be post-format-link. Also simple taxonomy queries are deprecated since 3.1 in favor of tax_query:

$args = array(
    'posts_per_page' => 5,
    'tax_query' => array(
        array(
            'taxonomy' => 'post_format',
            'field' => 'slug',
            'terms' => 'post-format-link'
        )
    )
);
$recent = new WP_Query( $args );