I have been told nothing about the 'Chickenpox bomber'. This is the first time I encountered the term, and I think I'll quit while I'm ahead.
Ah, the curse of knowledge. The author is clearly very experienced in his domain, so when a daft-but-useful meme happened to stray across into an area he knows about he felt empowered to refute it. The problem is that the meme, like most memes, is a wildly simplified abstraction for something else, not really a story about planes, and the story at its heart is more like a parable than a factual statement. Everyone who hears about the plane and the dots and the armour eventually understands it's about looking at a piece of evidence and realizing you need to look at the whole picture instead of what's immediately apparent (eg "planes that get shot" versus "planes that get shot <i>and survive</i>").<p>The author knows more about plane survivability than most, but couldn't see past the facts to understand the meaning.
I've known this story for years and was told about it by an aviation expert. Heard it later from multiple sources. Pretty surprised this was made up.