[quote]671 milliseconds vs 800 milliseconds page load times in the benchmarks will not be noticeable by a human.[/quote]
It won't be noticeable loading the 2 back to back, but it can create a perceived difference using it over time. 100ms differences CAN be noticed by humans. Just ask an online gamer if they'd rather have 100ms ping or 200ms. Racing drivers can tell when they are just 1-2 tenths (100-200ms) of a second faster in a sector (about a 30second time period) too, and I've experienced this myself in racing simulators like LFS/iRacing.
I'm NOT saying it's a big difference, or one that is easily noticeable, or one that we should make a huge fuss over. Your assertion that we can't perceive a 129ms difference is still false though. If that were the case we wouldn't need 30/60FPS videos (a 30FPS frame lasts 33ms) for it to seem smooth.