Let's assume that a HTTP roundtrip takes 100 ms. That's a pretty optimistic number. Let's also assume that they get a hit for each request. That's also pretty optimistic. That is about 3 hrs.
Anyway, it's a stupid argument. Of course they knew what they were doing. There is simply no reason to harvest unless the company doesn't take you seriously, of course. In any case, you shouldn't report the confidential data to a third party.
1)who said they only used 1 computer to hit the site? Either way, this could have been done very quickly given the speed and cheapness of technology of 2010.
2)Who said they handed over the email list? As far as I've heard/read from other articles, the hackers simply stated they had a list of emails...maybe they showed it to X # of people but I don't think they actually GAVE it to some in electronic or paper form.
Some day down the road we'll hear 99% of the full story from some reputable news outlet.
-Eric