Threat Rotation: Do Pallies have one?

So several weeks ago, I was talking shop with a Prot War by the name of Joujou when the subject of threat rotations came up. He was quite surprised when I told him that Pallies don't have one. This sat on the back burner of my mind until a few days ago, when I healed a Scholo group being Tanked by a Pally named Broligar. He was a type of Ret spec, but in full Prot gear. He was a friggin' MACHINE, pulling packs one after another, breaking only when I ended a pull low on mana. As a Pallyhealer, I needed to stop to drink two, maybe three times the whole run. He drank even less often. We blazed through that place like we were a team of plus sized models doing a photo shoot at a Chinese buffet. We even did Barov Family Fortune, and it was still the quickest Scholo I had ever been a part of.
The DPS consisted of trigger happy Gnomes and a hyperactive Rogue. They went bangety-bang and stabity-stab quickity-quick. He never once lost aggro. He was also wearing decent gear, but as our Tank gear has almost Zero threat stats on it atm, I began wondering if it was all in his technique. Do we, in fact, have a threat rotation that I am not aware of? If so, what would it be?
Many thanks in advance!
The DPS consisted of trigger happy Gnomes and a hyperactive Rogue. They went bangety-bang and stabity-stab quickity-quick. He never once lost aggro. He was also wearing decent gear, but as our Tank gear has almost Zero threat stats on it atm, I began wondering if it was all in his technique. Do we, in fact, have a threat rotation that I am not aware of? If so, what would it be?
Many thanks in advance!