WTP – I’m not sure I agree – at least according to the way that I understood BMYer’s question. In Chassidish circles (and to some extent in the more Yeshivish circles, whether American or Israeli), since everything else was checked out beforehand, all they are looking for is to see if they “click”.
I don’t know if that’s the same thing as saying “perfect together”. I think most people are just looking to see if they like each other and like talking to each other and feel like this is someone they can see themselves being married to. That is what I would call “clicking”, but maybe BMYer means something else.