While Lizzy seems to have kind of an impersonal interest in Darcy as a complex character (for example, curiousity about his relationship with Wickham, after having observed what must have been a very strange scene in the street), I don't really see any budding of interest, subconscious or otherwise.

In fact, what really struck me in the Week 2 reading was how much Lizzy was thinking about Wickham and how little about Darcy, when he isn't present or when someone connected to him isn't present.

It is Wickham, not Darcy, that she is dressing for when preparing for the Netherfield Ball (Chapter 18), and after she spends time with Wickham at her aunt and uncle's, "Elizabeth went away with her head full of him. She could think of nothing but of Mr. Wickham, and of what he had told her, all the way home..." (Chapter 16). This sounds like a woman who has a budding interest in a man, and I don't know of any equivalent passage describing her reaction to Darcy.

And who can blame her? -- "...when Mr. Wickham walked into the room, Elizabeth felt that she had neither been seeing him before, nor thinking of him since, with the smallest degree of unreasonable admiration. The officers of the -- -- shire were in general a very creditable, gentlemanlike set, and the best of them were of the present party; but Mr. Wickham was as far beyond them all in person, countenance, air, and walk, as they were superior to the broad-faced, stuffy uncle Philips, breathing port wine, who followed them into the room."