What strikes me about Miss Bingley's voice is the circumlocutions and indirectness of her opinions:

"I am inclined to think that"
It seems to me to shew
"I am afraid, Mr. Darcy,"... "that this adventure
"I think I have heard you say
"But I would really advise you
with many men, I dare say, it succeeds. But, in my opinion, (chpt 8)

"Pray tell your sister
"I am afraid you do not like your pen
pray let her know that I am quite in raptures
And, if I may mention so delicate a subject (chpt 10)

I would advise you
I am much mistaken if there are not some among us
"It would surely be much more rational"
let me persuade you
I feel he may defy us there. (chpt 11)

And then, am I fooling myself, or is there a bit more repetition of concepts in Caroline's speech than can be accounted for by pure chance? (Now I'm resorting to circumlocutions :) )

so untidy, so blowsy!"
alone, quite alone!
Such a countenance, such manners!
it is a paltry device, a very mean art." (chpt 8)