The experiment's already been done. House of Cards was only released with web DRM, and yet it was available via the usual unauthorised channels almost immediately. Even when no non-DRM alternatives are available, DRM is still useless in preventing dissemination.
It also sort of depends on the scale of copying. Having easily available "download movie from netflix" versus "download movie from shady piracy website". Obviously, the analog hole is always there, so there will always be that vulnerability.
OK, the experiment isn't exactly the same, but it tests the same hypothesis: that the presence of DRM does not affect the dissemination of the content.
In fact, I'm not sure that performing DrJokepu's experiment as stated would prove anything: releasing episodes of HoC without DRM would have little effect, as they have been copied despite not having been made available without DRM.