"They" should be the author of this article who chose the headline but failed to back up the claim in the story. If you are going to say that anything is 50% better, then at least show one instance where that was actually achieved. If you invent a new engine that you claim gets 50% better gas mileage, then you better show at least one trip of a significant distance where it did it.
I built a new database engine that I claim is at least 2x faster than Postgres at queries without needing separate indexes on the table columns. I don't claim it will always be that much faster on every query, but I show several instances where it is not only 2x faster, but 10x faster. https://www.youtube.com/watch?v=OVICKCkWMZE
Without a video like this, I would not expect anyone to take my claims seriously.
I built a new database engine that I claim is at least 2x faster than Postgres at queries without needing separate indexes on the table columns. I don't claim it will always be that much faster on every query, but I show several instances where it is not only 2x faster, but 10x faster. https://www.youtube.com/watch?v=OVICKCkWMZE
Without a video like this, I would not expect anyone to take my claims seriously.