Seconding this. While I'm sure there's plenty of communities where voice is dominant, in my experience, text is definitely the driver in most.
For larger servers (> 100), this seems to be the case since people are less familiar with each other and voice is more personal than text.
Smaller servers, however, seems to be predominantly chat IME.
I’m in servers ranging from small (a few 10s of users), over medium (currently about 100 online), to 2 large servers with 100s of users. All of those predominantly use text.
The community I run (>500 users) definitely leans toward text
Also, are you saying that, when people are unfamiliar with each other, they prefer to use a more familiar medium (like voice) to communicate at first? That is the exact opposite of my own experience