One of the many things I've learned in punting is that a couple of minutes hearing a voice is worth a hundred emails and texts. Of course it's not always infallible but you can pick up so many vibes.
The problem I have found in recent years though is there are so many with foreign accents it's not so easy to detect nuances. Foe example sometimes it might be a guide to their intelligence with British girls, you can't really pick this up with foreigners. However it's still possible to detect enthusiasm, and that is something many of the EE girls answering phones often don't suggest.
My biggest disaster from not hearing a voice initially was Mercedes in Derby. We had exchanged a series of texts and maybe even emails as I had booked a couple of days in advance, and she seemed articulate and intelligent with no spelling errors or text speak, and no bollocks such as 'hun.'
However when I called her just as I was about to get out of the car she sounded like a sixty year old rather than a twenty odd year old
. As I was already there after a lengthy journey without a plan B, like an idiot I went ahead with it. Although she was actually young (she must have smoked a lot of fags!) the experience was awful and if I'd have heard her raspy voice earlier I wouldn't have bothered.