Ironically, hiring more resources can result in longer times in the short-run. Resources are dedicated to hiring and training the new people. Additionally, those new people will not be operating at the same quality/efficiency level as the more experienced workers.
For now, i am blaming Star Wars.
When I called them last week the rep said they had hired some new graders but it takes some time to get the new guys kicking out books as fast as needed. He also said they are experiencing and exponential growth in books being submitted which they are having a hard time getting a handle on. Considering the new grading company must have taken some of their potential work load it translates into a LOT of books getting slabbed. Damn flippers!