<fixed that headline for you>
This is not news.
Smaller teams are also more efficient. See The Mythical Man-Month (1975) and many subsequent research projects.
"Large teams develop and small teams disrupt science and technology"
nature.com/articles/s4158…
"Analysis of 65 million projects finds smaller teams produce more innovative research"
sciencedaily.com/releases/2019/…
"The median size of the core innovation group has dropped from a football/soccer eleven to a basketball five. Less apparently enables more."
hbr.org/2011/12/quiet-…