Well, I had some mixed results. I went into CoS and all was going fine....did first 2 bosses with no wipes...although I did lose one or two party members on some trash. I mucked up the second trash pull in the gauntlet and Arthus died. I didn't even know that he could be killed So WoW decided to reward this by crashing my computer. When I got them all loged back in, I didn't realise they weren't in a group anymore until one was ported back to Dalaran :s So I reformed the group, but the teleport to instance button was gone. So I take him in and run him all the way into Strat again....to find I'm not in the same instance. Too annoyed to be trying to work it out, I decide to give HoL a try.
For some reason, I wipe twice on that first boss. Eventually down him and get through the elemental things...all but the tank die on the stairs. I eat/drink up, turn right on the stairs to take on the revenant thingies...and somehow pull the other group.....wipe So fed up I logged off for the night.

I'm not quitting just yet though....I'm still seeing it as a positive that I added another 2 bosses to my downed list. I might go back to doing guild groups for a bit in order to get better gear.