Here is a link to the media release from the University of Central Florida who did the research:
https://www.ucf.edu/news/study-shows-personalized-fonts-speed-up-reading-maintain-comprehension/
University of Central Florida researchers are part of a team who has found that there’s no one-size-fits all approach to digital reading and that adjusting font style and size can increase reading speed while maintaining comprehension. Think of it as prescription glasses for a digital world.
People can take the five-minute Virtual Readability Lab tests to discover the font and spacing that will help them read better.