The general public won't care so much about the dev center. If iTunes, App Store, or Apple Store had been hacked that would be much more serious from a PR standpoint.
My thought was not that the general public would care, rather it was that institutions own AAPL stock do care, and if they think that this event will affect Apple's ability to deliver product or recruit developers they may decide shift their portfolio's holdings to a different tech company with more upside.
