Females' greater realism about their abilities may cause them to work harder and earn more college degrees than males do.
The thing is, you've given the impression in the past that maybe females are under-represented in STEM fields because they have less innate talent in those areas.
The data from that study I quoted indicated that, on what was studied (scientific reasoning skills), females performed equally to males, but underrated their abilities.
This study appears to provide evidence that "females have less STEM talent" may not be true, but instead may be due to other reasons. Conversely, the statement "males have more STEM talent" may be due to overestimation of abilities.
