Yes, I just checked it out in S20. It does work using the marquee tool BUT that selects ALL the objects in a boxed area, not just the object or objects that you want to move.
In the case where I have accidentally added a number of different grass types to the route layer and want to move just them and not the many bushes and trees that I have also added in the same area, I would find it more efficient to use the Surveyor Classic method I described in a post above. But certainly, if I wanted to move all the objects and did not want to spend the time individually identifying every different object (and later discovering that I missed a few) then the S20 method is more efficient.