When I'm comfortable I can talk *a lot* and about everything and anything, but there's very few people with whom I'm like that. With the rest I talk when I need to. And I can stay in silence for a very long while if I'm not comfortable or around strangers.
One of my friends speaks so much, and as you say she repeats stuff time and time again. That I can never do - comfortable or uncomfortable.
But I agree with Becky - silences are one good way to measure privacy
