Faster fonts on mobile

WordPress has wp_is_mobile() function to detect mobile and handheld devices. You can use that to define your enqueue function to load fonts conditionally.

You can enqueue fonts for non mobile devices like this.

function my_enqueue_function() {

  if ( !wp_is_mobile() ) {

    wp_enqueue_style( 'gfonts', 'http://fonts.googleapis.com/css?family=Arbutus+Slab', false, NULL, 'all' );

  }

}
add_action( 'wp_enqueue_scripts', 'my_enqueue_function' );