Affected by this, and unless I'm reading the docs wrong 5 months is a bit of a PR exaggeration. Health insurance is longer but pay and vesting end mid-March.
My hope for folks affected (and, as a former SFDC employee, I know several affected) is that it's pay & vesting for the WARN period, with the severance period following that.
Overall will probably be a good change - as much as I liked our product, the sfdc transition was rough. For better or worse the layoffs don't seem to have been totally random: most of the affected folks I know had larger than normal equity packages