With the fancy new uploader, you can carry out the following steps:
At steps 3 and 5 (especially 5) there is a period of waiting with no feedback at all. Asking for a progress bar might be too much, but I would like to see some sort of feedback to acknowledge that I have done something, the server knows about it, and I need to be patient.
I dare guess that this is one of those areas where the web-developers have fast machines and super-fast network connectivity, and don't see how long it takes for distant users with machines that really could do with an upgrade.
(This was a problem with the old Image Uploader too, but with the fancy new one, it occurs to me to report it.)
Okay, okay, I'm going to completely change my answer...
Naturally, when you open the file selection, it might take a while for the computer to get all the files and bring them back to you. Ouch. That can take seconds to minutes at times with no warning beforehand. Of course, no one can fix this dilemma but a progress bar should help with the waiting. It should be a similar one to Step 6:
And a good-old fashioned green progress bar for Step 3 and 4. It should be permanently enabled for every user. I hope this gets implemented!