Poor Bingley. JA notes that he is "by no means deficient" but his reply
"Upon my word, Caroline, I should think it more possible to get Pemberley by purchase than by imitation."
is very finely phrased.
There is little text to work with but can we say that Darcy is more subtle? - when he wants to be that is ;D
Darcy to Lizzy (for the first time?)
"With great energy; but it is always a subject which makes a lady energetic."
The direct reply is followed by a subtle tease. I imagine that 'energetic' tends towards the unfashionable. I can see that this is intended to directly encourage further conversation.
Why oh why did Charlotte interrupt with her demands for piano playing?