Ran my first test flight today with my Phantom 3 Pro and the flight went very smoothly. Trying to upload the images now and just wanted to report the same problem.
When using the "manual" upload from the SD card on my laptop, it selected 4 of the images to upload first. The first 90% of the progress indicator for each of the 4 uploads progressed very fast (faster than I would expect them to upload on the slow connection I'm using).
Once they reached 90.1% on all of the 4 uploads, the progress indicator seemed to stall, and while I've been typing this, the first 4 images completed and it's onto the next 4.
So I think the only issue here is that the progress indicator is inaccurate or is misleading. But other than that, so far so good.
[EDIT] The progress indicator seems to be much more accurate on subsequent batches of images.