good roots/bad roots & velamen pull test?

[Becca]

I am not sure what I should title this question, sorry! I know I have posted questions similar to this, but I don't think this one ever got answered for me head on so here it goes: When receiving plants bare root from sellers who send the plants through a drying process and then when the plants are received and you soak them to help revive them and the roots seem all squishy and rotted and the velamen pulls off of the roots easily, how do these plants get so large on this kind of a root system? Are the roots perhaps good and I think they are bad becuase I use the pull test on the velamen?