Thaal Sinestro, kinda yes, generally "ты" is only used with people around your age and younger (except when someone is serving you, then it's "Вы" regardless), your friends (and their friends), your relatives... It's complicated and I don't think there are formal rules on that. Some staff in some trendy coffee shops would sometimes use "ты" with their customers but I personally find that a bit cringy.