I’m not even sure they actually have a reference, to be honest.
A lot of stuff in Vanilla has TBC values that are then reverted when the paladins lose their damn minds in the Bug Report Forums.
Nightfall and Annihilator not proccing properly, for example - the problem is it’s further than just the PPM value being accurate, the way PPM behaves was changed in TBC and caused procs to happen more frequently within the first or last 60 seconds of each rotation much more frequently.
You see this happening if you run a twink with lifestealing first hand.
Fizzle effect wasn’t introduced until TBC and there aren’t any training dummies in Classic so it’s impossible to log properly one way or the other - raid logs don’t pick it up because it doesn’t exist in the combat logs.
It still happens with Sulfuras - but the meta gamers don’t care enough around the weapon to really look into it.
This happens across ALL PPM items, Skullflame Shield, Sulfuras, Lifestealing, etc. I need to bust out my Tidal Charm and see if the Fizzle Effect theory is really a thing, but who the hell wants to spam Tidal Charm 1,000+ times with a 15 minute cooldown?