Hello,
It could be interesting to see also the "measurements" of the people who did this study. Indeed, even if I am not a weightlifter, I guess some moves are easier for someone shorter and some other harder. Depending on the size of the sample, it could greatly alter the results.
Plus,maybe some of them works more on the DL or on the Sq. This could explain as well why some results can be "surprising": if one does not train the DL, then from a statiscal standpoint, his DL can be lower than his Sq, comparing to someone who train equally both moves. Maybe there's also a better transfer from Sq to DL (or the other way around) ?
Like all the studies, it can be hard to find something without any bias and or (over) simplification.This study can give some perspective. From there we can see how we compare to it but nothing prevents us to compare to other study as well.
Kind regards,
Pet'