I've noticed some comments regarding the video Ash included in this article of himself performing barbell rows. It seems that many people "think" they can correctly asses form faults from a video but fall way short in their interpretation. People without a highly trained and experienced eye (most bodybuilding forum members!) simply do not understand "what they are looking at" and are reacting to superficials with a poor understanding of the anatomy involved.
A common one in regards to rows and even deadlifts, etc, and which is coming up about this video is the "upper back being rounded". It seems that when people see the shoulders rounding forward they equate this with a "rounded back". So, in other words people expect to see "squared shoulders" throughout a barbell row.
So let's iron out of few things here. Thoracic rounding will coincide with the scapula protracting. Yes. So the shoulders will "round" or move forward. However, the the scapula can protract (abduct) without the thoracic spine rounding a lot. What we see in the video is Ashiem allowing his shoulder blades to come forward during the bar's descent and then he is actively retracting them to move the bar up. This is the primary impetus of the movement.
If someone's shoulders remained squared back during the entire performance of a barbell row then they are rowing incorrectly. As they have already fully contracted the muscles of the back responsible for moving the bar and it will be all arms.
Another problem is that people do not understand that people have different degrees of thoracic arch and thoracic flexibility in general. Just because you see a video of someone with a really pronounced thoracic arch does not mean that everyone's arch will look exactly like that. Correct is relative to the individual. If you expect everyone to look the same doing an exercise like rows then you do not know how to evaluate in the first place.