Did you roll on Reality Lost or? :P
Our first team:
Me : Healer
Edore: Controller
Heavy WeaponsGuy : Tank
Frozen Arrow : DPS
We are fair geared and we just cleared arkham asylum. We also got an achievement called Breaking the Chain of Command: Defeat the Iron Statue before the Bronze Idol. Was difficult as our tank got instakilled when the Iron Statue became active but we managed to get it down

, Should be raiding soon a fair amount of people have T1 in our guild now. We have 1 tank geared which is Heavy WeaponsGuy he is sitting at 2500health and 3100defense lol which basically means he has 43.6% damage reduction :]
Here is a screenie of Arkham Asylum stats. It IS a long instance and we cleared EVERYTHING hense the 98mins xD - There is an achievement for completing it in 30mins lol.
http://img828.imageshack.us/i/arhamstats.jpg/
Our first team has completed every hard mode alert, normal mode alert, duo, solo dungeons and world kills, Just raids to do.
We do have a second team but not sure how their progression is going.