I believe most game dev studios have similar levels of turnover for new developers. I guess it shouldn't be surprising, both industies rely on the passion of their employees to get products out the door, while under-paying and overworking them.

The source the article gets that 90% statistic from, the anime dormitory project, is actually a pretty good charity if you're looking for ways to support animators and their working conditions. Right now they're subsidizing housing for more than 10 animators, and I think there's a fundraiser still running at the moment that's trying to make real change to improve the industry's working standards overall. Here's a recent YouTube video they made on the subject.