I would guess to allow candidates to check their own status, before their co-workers do.
Why the sample answers haven’t yet been posted for the fall sitting… now that question is beyond me. Seems to me that those should be posted immediately after the sitting, to allow for potential discrepancies with source material. But apparently the SOA doesn’t think so.
Yea, having a co-worker or friend find out your results first isn’t really fair. Especially your boss finding out before you, just uncomfortable. I like being able to digest the results before sharing!