The people who build landing pages for hardware startups are usually (almost always) not the same people who design and build the actual hardware, for better or worse. A lot of the times, it's a outsourced web design agency who receive a brief, often written by business people, and finally the website is reviewed by business people, with some feedback from technical people who complain about the graphs, accuracy and so on. Then the business people say "But we need to point out we're faster than everyone else" and the engineers reply with "Sure, ok, whatever, I have actual work to do, sounds good".