The articles which give the 10am-4pm timeframe also claim that it wasn't an attack, that it was some datafiles that got corrupted. How much truth there is to the statement is anyone's guess. (Although it seems to me like it would be more advantageous to lie in the other direction. If I were using godaddy, I would feel much more comfortable thinking that the outage was due to an attack (something completely outside of the company's control) than something like corrupted files (which casts doubt upon the reliability of the company & their products/services).)
*Warning: The above post may be highly opinionated, read it at your own risk.
Have you ever flocked an udder?