If you're interacting with a text-based chat interface you get one thing, pieces of text, not only that's all you have to make decisions, but you have no idea how much effort and time went into designing those messages for you, this translates into the simples human interactions.
If you are talking on the phone, you get words and maybe a tone of voice, you get more timely information, but that is all.
If you are doing video chat, you get to see the persons expressions, which is a plus, but not much more(and how many times have I seen audio/video data issues).
But, if you are meeting in person, you get all of that and then some, plus it signals commitment and effort to allocate time to physically attend a meeting considering how much other options you have. These do not have precise metrics, but it drives people gut decisions.