She was obviously trolling. Look at her snarky closing remarks. Just report her for trolling on her posts, they'll ban her, and we can move on. :-P
Not really worried right now about guilds clearing out the raiding content. It is early. There wasn't much testing done in beta, some, but not widespread like in WOW. There are likely bugs in it to allow for unique methods to beat the bosses. If anything what this will do is allow BioWare to re-evaluate the numbers and then buff them as they see fit. I would think the goal for Nightmare would to make it mathematically possible to beat, but one slight screw up (mistimed attack or two) and you are looking at a 0.1% wipe when enrage hits.
Much like those that got to 50 in a day or two, there will probably be some bans handed out for abusing bugs in the game. Common sense people.