It's all marketing talk, sort of.
replyOur transistors are about 30 nm give or take. But we've found new ways of aligning them so that if we had continued using old techniques, the density we get would be "2nm".
Imagine if any other industry worked like this.
reply"Our Quarter Pounder may weigh only 1/8 oz, but we figured out how to pack double the flavor in each mouthful, so we're still selling it as a Quarter Pounder."