Ahhhh, yes. There were a crap load of jobs sitting in there. I think we may have had some impatience going on with some users in processing.
I've cleared them all out and tried again and it's processing now. Having said that it is taking a long time. The first two took about 20-30 seconds but the next 3 are still going 10 mins on.
The files are largish but not ridiculous, 1200x800 and around 700-900 KB. Delay could be in the uploading to S3?