I don't think script kiddies could do this size of a hack, especially considering the amount of data involved and stay under the radar this long. If this is what a script kiddie is capable of... then what is a real hacker capable of?
No one was saying that this was done by script kiddies, but IIRC there were monitors on Sony's network for suspicious activity, and they did flag some of the activity, but the relevant people were told to ignore it by Sony's 'security' team. (I imagine this means that they get lots of false-positives and were just too used to ignore the alerts?)
It seems like Sony did a lot of stuff wrong in the end but instead of owning up to the mistakes are going to claim that it was a terrorist attack on their syste .