As someone who sat at the 'slow table' for years at primary I will admit that I have a bit of a hang up about a DC being in the set/group/table that need more help. My self esteem was very badly damaged.
I went on to be successful and a boy who sat with me became super successful so it didn't blight us for life!
Those at that table, I am still friends with 2, all 'felt' it. The teachers resented us, there were some children who had some sort of undiagnosed learning disability, another who slept most of the time and a couple that were very disruptive. We were all lumped together because they didn't know what else to do with us.
In your experience if a DC improves and needs are better met at a different 'table' do they actually get to move there?Is there fluidity between sets etc? Is there ever any danger a child might be 'labelled' early on and that become a self fulfilling prophecy?