If you are using sessions then you could simply move the images to the Selects folder, or Cmd-J.
That's what I'm doing now, but here is the difference in workflow.
LR - right click on parent folder -> create new folder (make sure check box is set to move them to the new folder) - done, just a right click
C1 - right click on parent folder -> create new folder -> right click on new folder -> set as selects folder -> Command + J
That's the point I'm trying to get across. The workflow on v3.xx was so simple was brilliant. Instead of keeping it that simple (you can add features and still keep a simple workflow), it was changed and you either have to be a savant to remember all kinds of keyboard combinations or you need a lot of mouse clicks.