Heroics can definitely be chain pulled with 0 cc once the tank is geared. I don't bother waiting on anyone to CC anymore when tanking heroics, and sometimes pull extra packs just to speed it up, without any problems. That being said, when first starting, I absolutely couldn't do that, and asked for things like sheep or sap on some of the meaner pulls.
We're now in that stage where the frontrunners are just about finished with gearing from heroics, and are only after one or two pieces, so we kind of want to speed run through the dungeons for the X'th time, while freshly 100 characters are joining in and not able to keep up with that pace right out of the gate.