re: Here's why.
Changes measured by percentages can be misleading, especially when the raw numbers are not presented for perspective (and they rarely are). Percents used to measure parts of a whole are not the same thing.
Actually, the news article you linked to, to its credit, did present the actual numbers and only used percentages to show relationships to the totals. I didn't see any used of "delta percentages" in the article. You're the one who dragged that in.