Do you lend your books? Are any out on loan right now? Do you have any that have been loaned to you? Do you put a time limit on these? Do you think people should make an effort to read the loaned book quickly?
Majority of the books that are reviewed on here are well... borrowed. From the library. Though, on my side of the world, I don't borrow books unless I trust that you're responsible enough to give it back, so there's none being loaned *o*
As for reading a loaned book quickly, I honestly don't mind how long you take, though if it's more than 2 months and I don't see it back, I don't think I'll be a happy camper. But at least don't let it sit there forever and not read it. The book's going to feel really lonely by then ;)