WordPress Replace "Howdy"

<?php 

// Not everyone is a cowboy.
function daltonsutton_replace_howdy($wp_admin_bar) {
    $my_account = $wp_admin_bar->get_node('my-account');
    $newtitle = str_replace( 'Howdy, ', 'Logged in as ', $my_account->title );            
    $wp_admin_bar->add_node( array(
        'id' => 'my-account',
        'title' => $newtitle,
    ) );
}
add_filter('admin_bar_menu', 'daltonsutton_replace_howdy', 25);