Include number of search results in Genesis title

search.php

<?php
add_filter( 'genesis_search_title_text', 'my_search_title_text' );

function my_search_title_text( $title ) {
    global $wp_query;
    $start = ( ( $wp_query->paged - 1 ) * $wp_query->posts_per_page ) + 1;
    $end = $wp_query->paged * $wp_query->posts_per_page;
    return sprintf( '%s (%d&mdash;%d of %d)', $title, $start, $end, $wp_query->found_posts );
}

genesis();