I am by no means addressing you as though you're dumb, but you haven't understood what I wrote above. WooThemes, Headway, Genesis etc.. do not create dynamic image sizes, these are created by Wordpress and not the theme (unless they have added extra code, which I don't think they have). When you use the Featured Image option, the image is generated a number of times (this may depend on your image) with different sizes.
These images can be found in your uploads folder unless you changed it and there can be more sizes that depend on your image original dimensions.
However, your original question was this:
Why doesn't Flipper resize the image files? Makes this page a 22MB download for 6 posts!
Your page is that large because of your image sizes, which are just far to large. Now, Flipper has been updated to allow you to select which image.
However, regardless if Wordpress generates numerous sizes of your images or not, your images are far to large to begin with, like I have shown you in a previous post 16.2mb for one image is just too large. You need to reduce these images, it is not the themes or Wordpress job reduce your image for you, that is why there are numerous image optimization services and apps out there, you can even use Adobe Photoshop or GIMP.
Wordpress also has an article on this very subject in it's condex - http://codex.wordpre...ize_and_Quality
Now, as for the reason why you have a 16.2mb file as your blogs post thumb, this is because you're using the "On Top" option which uses the full size image, if you use any other option your image will not be this large as it will use a thumb.
So I will speak to one of developers and ask them. However, I remember a similar question being brought up a few years ago regarding this and there was a reason as to why it was using the full size image.