What does he mean as in faster keyboard display? It pops up quicker? 

Ahh yes the ol' "Up to" used by Apple and Intel.

Based on other articles I've read, yes. 

Considering it just improves performance (and doesn't drop anything), it should support the same models. Although, it's definitely still a good thing.

@BlueChinchillaEatingDorito yeah. On the older devices it actually can lag a lot.

@germgoatz Used by literally every marketing department from every company in existence.*

hmm. I thought they were going to phase out the iPhone 5s this year 

it drains the battery faster so you'll have to buy a the iphone xix