I think it would make a difference, in that if the user is somewhat convinced that the site is able to handle that issue then they will be more willing to take

I think it would make a difference, in that if the user is somewhat convinced that the site is able to handle that issue then they will be more willing to take a leap of faith. My point being, I'm perfectly capable of finding books I'd never read by myself - I just have to enter a library or bookshop and grab the first title that makes me frown. There's only value in giving me books out of my circle of comfort if there's an implication that I might like the book or get something out of it, with more likelihood than mere chance, isn't it?