Yes. You're not "meant" to be able to backspace over content that wasn't added in your current transaction. Which is really inconvenient, because if you delete things when you're in command mode then it overwrites what's in your buffer, which is often convenient.
In my daily browsing, I often see Designs that are not on that list.
For example Hacker News is a very standard interface to me. I would call it "Forum".
"Search" looks like it has multiple columns, but in my daily experience the main characteristic of "search" is that it only has a single column of results. (Google, Amazon, Yeahit...)
Another standard Layout, I would call "Portal". Yahoo is an example. Most pages are more or less "Portal" these days. (Another name for "Portal" is "utter mess".)
Speaking of the design of Hacker News. I think that not having a footer that gives visual feedback that you've reached the end of the page is a glaring usability flaw!
On HN, when you scroll down page by page and you reach the bottom there is no visual indication that you are at the bottom. And since you haven't scrolled a complete page down you are forced to rescan the page to find where you left off reading.
The NYT gets this right. Their footer is big enough so that with a regular window you'll always scroll complete pages until you see the footer.
I like the HN contents, so I put up with the design flaw.
The author qualified this list as designs he has used for himself in enterprise software. I don't believe that he was suggesting that these were a list Set In Stone.
http://en.gibney.org/calculator/