Not quite. He said that early on most apps haven't been updated to take advantage of the new size properly so for those they'll just be bigger or else won't display properly.Really, the Verge review said that? Wow.
The XS Max also doesn’t really do a ton in software to take advantage of that big display: there’s no extra row of home screen icons or picture-in-picture for video. Some apps that haven’t been updated look a little broken right now, particularly Instagram. Everything else is mostly just bigger; apps like Slack, Gmail, and Twitter show you the exact same amount of information as the smaller XS. If you think big things are funny (they are) check out the size of the status bar when you pull Control Center down.
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Personally I think that while his statement is technically correct, it's kind of misleading, because he glossed over the apps like Safari that have been updated to take advantage of the extra screen real estate.
It's the same thing that happened with the iPhone 6 Plus vs. the iPhone 6.