fins wake once bubbled...
There have been instances of people learning to dive directly on SC (in Germany for the purposes of a Tauchen magazine feature), but I can't recollect anybody learning - officially - straight on CC (at least not in the civilian sports diving sector). I'm not aware of the APD example, but I'd be very surprised if this were true. Most introductory CC training standards require Advanced Nitrox or similar and a minimum number of dives, usually in the order of at least 50-70.
With all due respect, it's difficult to believe Trixter is not a troll, especially with the Steam Machines comment (well the PADI comment as well ... uh, actually most comments).
For the truly inquisitive, though, there was a great (serious) thread along these lines - i.e. when to go CC - on the DiveOz forum a while back.
Yes,
One person at APD started diving on a CCR. This person had NO diving experience prior to starting work, learned the Inspiration and eventually got a "open water " card while doing the dives on the inspiration (got a written waivor) and was actually diving the unit for some time before being officially certified..