I think it can be more efficient in the sense of being direct. If you think about the amount of going round the houses it can cut out then it's a winner. Most canned openers amount to attempting to show no attraction/going under the radar. It is then you have to make your intentions shown and the longer you leave it, the harder it gets!

My recent day game number close success has proved this to me. It is blatantly obvious to her I find her hot and she is loving this. For exmaple we have exchanged a couple of texts about the hotpants she was wearing when I met her, so much so I called her Hotpants last night, she loves it