"HTML" version shows no images, just text and favicons. The total size of visible text content shown on the page is about 4KB (just did a count of characters on the page for "steve jobs" query). DDG shows those 4KB using 248KB of data.
1. That is not _that_ small. It's only small compared to the rest of the web, but not in absolute numbers, or in comparison to useful content shown.
2. The content to data ratio comes at 1:62. Or for one character shown on screen you are transferring 62 bytes of stuff. For context, Wikipedia page for Steve Jobs, which also includes multiple images, is 1.08MB and content is 128KB for a content to data ratio of about 1:9. So DuckDuckGo could in theory do ~7x better than this.
Sorry, as an engineer, not impressed at all!