If more privacy-conscious users start using TrueCrypt after the revelations made (Dropbox being able to decrypt your data) in their latest blog post, http://news.ycombinator.com/item?id=2470074 , that conversion rate will need to be higher.
True, though I bet 90% of users don't even realise there's been an "uproar" over Dropbox's security.
It's not even an uproar really. The only people who care are privacy freaks who didn't take the time to think through the implications of Dropbox's feature set when they first signed up.