We cleared BT in one night, and we wiped ... once ... on Illidan.
The fight went down so fast, he hit the demon phase with me at 90% or so mana in my healing gear (I went healing again, I figured staying DPS I only add 800 or so, and if I put on Righteous fury for the damage reduction I can pull off the other tanks which would be bad), and it went really well, then the fire tank died (100% -> 0% in less time than I can drop a flash of light), no idea why, and it kindof just fell apart with the flame getting picked up and leaving a trail of dead people. Despite the nerfs, the main principle of raiding is still "don't stand in the fire"*.
Its really odd seeing us wipe here, no one was treating this seriously, it was more like a Karazhan run than a BT run, and so odd, the attitude of it being too easy in itself lead to the near wipe because people have no interest in maintaining discipline.
I wish it was still hard.
On a side note I nearly tanked mother, She is normally quite a horrible boss, however I kept track of the MTs threat for the duration of the fight, and an emergency hand of salvation on myself when I popped over the MT (not a good plan when healers aren't focus healing). Seemed a lot of fun to just try and nearly pull, testing yourself against another tank to see how far you can go.
* Note: Fire can be sludge, fire, raindrops or roses, but the running theme is that mobility is important and if you can't respond to environmental effects you will just die.