Without prefetch, on a lot of the pages I've cross-checked manually, it doesn't. So there's already gaming from the other side of the aisle in a sense.
On the contrary, I feel like it takes more planning to build something that's slow than building something fast. Only once you've made elaborate designs and hired people who are used to including the six megabytes of javascript libraries they've accumulated over the years, it gets tricky.
In the past I've been happily surprised when I wanted to look something up on my own blog over some slow, public WiFi, and it loads super fast compared to everything else. (I'm not the only one, of course, but most small websites don't have a huge team behind it and are not very popular.) It's just because it's a personal thing which I've kept simple and built from scratch.
You can! But so few people actually do. Kind of like abstinence-only birth control.