Having never followed the original discussion about 'backing in' I've always been curious as to what exactly was the point of contention. I'm not sure if getting in the middle of this ....-fight is such a good idea, but anyway...
I'm not sure if this is exactly the same thing or not, but I have seen something like this done--on bicycles. When I was a teenager I used to own two pushbikes. The first was an old hand-me down; a simple ten-speed frame with cowhorns (dragster-style handlebars) and what I know as 'pedal' brakes (i.e. you push the pedals backwards to stop the back wheel). Over time I got pretty good at 'stamping' on the pedal to skid into corners/to a stop. The second bike was a shiny new BMX with caliper brakes, front and back. I hated those brakes! I could never get the back wheel to skid 20-30 feet like I could with the first bike--I couldn't pull hard enough on the brake lever...
But I used to ride around with a group of friends on yet-to-be developed housing estates, creek trails and through paddocks with tracks made by dirt-bike riders. Sometimes not everyone had a bike and I'd lend one of mine. So, I'm following a friend riding my BMX one day and he does this huge skid into a corner; I was amazed. I asked him how he did it, thinking he must've grabbed that brake lever so hard. He said, "You don't use any brakes." I watched him again and again, and sure enough, he wasn't touching the brakes. He'd stop pedaling on approach, stand up (if he wasn't already) and... skid the back wheel into the corner. I can't really say what the front wheel was doing or much about his body position--I was always watching the skid/the fact that he wasn't using the brakes. I paid more attention to some of the other guys after that, and there were a few others who could do it as well. Of course I tried to learn it, but never came close to mastering it; I crashed a lot, usually over the highside. The friend who I saw skidding like that first always said it was because I was too used to using the pedal brake on my old bike to skid.
Now whether this can be transfered to much heavier motorcylces, at potentially much faster speeds and on a sealed surface I don't know--but the technique you outlined above, is, at least, physically possible.
I'm pretty sure Barry already knew who he was. After all, I really only follow the MotoGP circus, WSBK and JSBK (I haven't even kept up with Aus road racing since I moved back a couple of years ago!) and I knew who he was.
Also, it is important to note that Casey Stoner is legend... wait for it, wait for it... dairy!