Nothing has changed here.
Here is a slightly truncated answer to my question posted at Hoopla Tech Support:
"We haven't made any changes in the way images are handled in Hoop.la at all...If you drag and drop a larger image into the post it'll bypass the option to choose a size to display. Instead, if you click add attachment, upload it, then go back and click to insert it into your post you will get the popup that asks which size to embed. I think they are skipping that step.
Either way, clicking the thumbnail in the attachments section will give you the full size.
However they are doing it, this is not anything that is new. We haven't made changes to it in a long long time."
OK folks, there ya go.
