Looks like the Compulsion got around to fixing the checkpoint warp. Preview build branch 29524 has patched it. You can read more of the patch notes here: http://steamcommunity.com/app/320240/discussions/0/350540973991459815/ Once it becomes the main build I am going to remove the warp category.

I take this back. I was still able to warp off the island.

You can still do it even in current Version.

Yeah but not as fast as OG

Yeah the context of this original post is not the same thing you are thinking of Potato. The original mention of the name "Checkpoint Warping" was in regards to this:

I called it checkpoint warping because you could basically warp across the map based on the positions of the checkpoints. Quitting out to abuse the checkpoints is its own thing really. It doesn't skip the walking though.