

What Russell wrote there certainly applies to a candidate's academic ability, but that is not the only reason people drop out. As for completing the coursework, getting this Japanese ABD thing and then quitting without writing or defending your PhD thesis fully what Dimwit said must figure in to more than a few, but there are also the problems of time, money and energy. Even a promising scholar that hits the time limit is seriously constrained by regulations from keeping at it, and the alarming lack of funding for almost any Jpn postgrads outside the hard sciences means a lot of people live in grinding poverty for 6 or 7 years and just run out of gas. As a comparison, I was better paid to do a PhD than I had been running a tour guide company. I had a generous monthly stipend and expenses and access to a bounty of special subsidies for which I applied assiduously.
All of which is fine and hardly abnormal in a comparative view, my own funding included. My only complaint is the acceptance of this ABD thingy as a final qualification of sorts. An ABD means a student is now in the final stage of completing their thesis and proceeding to its defence, and is largely a NAmerican and Jpn term. Using it as a terminal qualification is a misrepresentation of what it means, in MYHOMO. I know and have met these terminal ABDs that seem quite comfortable assuming a commensurate qualification with a full PhD. A full PhD that thinks that should be ashamed of themselves. BUT, if all they have done is claim a Jpn ABD they are guilty of douchey BS, not outright fraud or even misrepresentation. As Take pointed out, the Jpn ABD claim is as common as bags of Calbee Usu-Shio at a backyard BBQ. And to be as fair as possible, they do like their micro-qualifications, as we all know. My ex had a 6th Level licence in filing. Filing as in filing files in filing cabinets, Dimmy. Filing.
What interests me is why people seem so excited about this. I get it with the Big Schnozzed TV commentator because he was lying. At this point it doesn't seem these guys are.