The forum software scrunches them down much smaller. They make a much bigger impact at full resolution.
That is probably the correct terminilogy because it is the full resolution in the pop-up but its resized by the browser, you may notice some aliasing in the pop-up because browsers generally do a poor job of resizing. Anyhow I added a link for full size image but this goes to a new page which is something I'm trying to avoid. Now off to explore anti aliasing in image magick for the thumbs, its very evident on that one picture of the red plane above.