Smashwords has daily uploads of new authors offering free e-books too - I've so far downloaded more in their free fiction section than I've had time to read, but I hope to read some soon so I can at least give a bit of feed back. I tend to be quick on the download button and slower reading.
I try to encourage newer authors because there are some out there with a lot of potential. And I can't complain of the free price
If I don't like a book (or the grammar, editing or formatting doesn't measure up) I usually know within the first dozen pages, and will then delete it without worrying.
I even get picky with bestsellers. I tend to veer off the beaten path for newer novels and very few actually grab me to the point of wanting to buy. Favorites have actually had *repeated* purchases due to giving to a friend, reading repeatedly and losing pages, etc.... so when I love a book I invest not only lots of time but a lot of money to make a story part of my "life library".