Yesterday, I did this... tank ques are usually longer ~30 mins (if you que tank/dps they force you to be a tank and you still wait 30mins.) just dps ques 1 min. So qued as a dps... stayed in prot... did this for all 6 bosses in LFR... got 3 peices of tank gear and two legendary quest items. Smiled to myself that ironicly this is was was happening in LFG with the dps queing as a tank to get fast que times... pay back is a b*tch dps.
Well i stand corrected. Everyone just has a 4% chance. I was wrong. I thought 5 pieces dropped and everyone could use a coin for an extra chance. Now there is a roll char by char, so there is no gear benefit to LFR for 2 guilds. Just the No Asshats and it will go smoother hypothetically. LOL