No, it is breaking past the limit of 20%. You generally only use peaks if you are expecting it to drop in the future or if it has since dropped.
Fair enough, peaks isn't right,'reaches' maybe. Breaks just read wrong for me at first glance, I thought it was saying the usage of ipv6 was broken for 20% of users worldwide. That was obviously just a huge brain fail on my part.
I see your point, the title was a little bit ambiguous when I first read it.
I thought 20% of IPv6 went down or something.
A peak broke 20% - so I think it's a reasonable title.