The loan volumes aren't really high enough to get good stats, but there is evidence that the default rate assumptions LC used to set their interest rates were naive.
There's a surprise.

But their numbers sure look a whole lot better than Prosper's. Except for the first month of operation, it looks like a 4-8% "bad" rate in a year. But IIRC, they don't lend to the lower end of Prosper's borrower base, so I guess that is to be expected.