> They were at no point comparing the latest version of Safari against a year old version of Chrome.

They tend to update that page after a Safari update, which is yearly. They tend to highlight benchmarks that Safari looks good in. If Chrome and Firefox then optimize these highlighted benchmarks and catch up on these benchmarks within a month, Apple still has that page show the old data for a year. And for next year's release they again pick the benchmarks that look best for them at that moment in time and keep the numbers up for a year. Even though this update cadence guarantees that the numbers are outdated and misleading for the majority of the time they're up.