That's pretty much how I would expect an app like this to work on a Mac!
Really? What if you want to copy a group of images? If what you describe is correct, when you drag and drop a group of images, wouldn't you get copies of the thumbnails.
I'm pretty sure my GF did this. I asked her for full res copies of some images of us, and got resized low-res versions. She uses iPhoto said she just dragged them out of the app. I had to fuss around with it and finally got what I wanted by using an export feature.
Dragging and dropping each full-resolution images one by one sounds like a nightmare.
> That's pretty much how I would expect an app like this to work on a Mac!
If this is what's now expected from Macs, oh how Apple has fallen. I can think of zero use cases where you'd actually want to drag and drop the thumbnail out, but not the full resolution image.