You should be able to get a general vibe a chat conversation and certainly can tell more by speaking to someone via telephone.
I disagree (again) that this is a reliable method of identifying scams and horrible work quality. Obviously, if the representative barely speaks English, it's unlikely that you're going to get even halfway decent work (or
any work, necessarily); but all you have to do is search this forum for some of these posted "chats" to see that many of these companies know how to exploit the con game very well. Remember that "con" is short for
confidence, as in
gaining the confidence of victims. So the fact that a phone rep speaks fluent English, knows how to discuss different types of academic projects, and expresses high confidence in the ability of a writer who is supposedly "perfect" for your project means absolutely nothing if that rep knows how to sell you on something that just turns out to be a con game. The only thing the phone test is good for might be identifying con artists who aren't particularly good at their "jobs."
I know nothing about this particular company besides the fact that whoever wrote that web copy is obviously ESL; but I do note that when I visited the site, one of the pop-ups offered me the services of "Jerimiah" and referred to him as one of their most experienced writers with "150+" projects to his credit in "8+" years, which works out to fewer than 20 projects per
year. An "experienced" writer in this field typically writes 20 projects every
week, especially throughout the busy seasons.