I did a quick search for this prior to posting, but didn't find anything. I apologize in advance if it's already been covered:
This work unit:
has a status of "Completed, waiting for validation" by one user who got through it in just over three seconds.
I've got a computer working on it as well, and I know my machine isn't the fastest, but it's going to take me close to 320 hours to complete. Is there an easy explanation for the orders of magnitude difference in completion times?