Forget about relationships with women who will leave you on read all day. Or worse: don't even bother to read your messages until later. The right woman for you will respond to you the moment she gets your text or call. And it's not because she has nothing better to do. It's because you're her top priority and she's always ready to drop everything to help you.
This isn't a totally selfless act. She loves communicating with you, so it's not a chore at all. A text from you is a bright distraction in an otherwise boring day at work. When you're in love, receiving a text from your partner is a highlight, not something to ignore until later. So, text away, because you're likely to receive a pretty fast response if she's really in love with you.