tl;dr: what Sharlene really went to jail for was more than shifting grant dates around (some by more than 60 days, which is more than a month last time I checked.) She appears to have changed grant and exercise dates both to increase income and to shift exercise income to long term capital gains, and then mislead auditors about these practices. Specifically, she want to jail for listing a false exercise date on her income tax return.
The point is, according to the reporter, what she went to jail for was more clear-cut than Ben is claiming.
[1] http://go.bloomberg.com/market-now/2014/02/12/dont-worry-ben...
[2] https://web.archive.org/web/20140309175428/http://go.bloombe...