Generally speaking* 1 Spelldamage = 0.63 Threat Per Second assuming max rank spell usage on non-undead/demonic mobs.

When I'm tanking Gruul I'm putting out (WoW Gold)around ~800 TPS with continual AW usage (average).
Whilst this is a respectable number, it's not enough, a lot of the DPS in the raid are significantly limited by even our threat generation, and whilst it is nice that we have the best scaling threat generation as a tank in the game, it's extremely frustrating that pumping it - costs you, badly.

Not all of us have(WoW Gold) a not-working-as-intended SoB, and not all of us have the ability to stack melee related stats in order to boost our TPS.
It would be lovely to have it, but generally the accepted tanking seal, and the one that should rightfully be best, is neither SoB nor SoV, it should realistically be SoR.

There are other absurdities in faction based raiding ATM that annoy me, like the Taurens Stamina increase racial, and the alliance priest racials in comparison to the horde ones.
It's frustrating that there's a difference so generally when you write comprehensive guides like this you should make them just that;
Comprehensive, or state otherwise.

When I have some more time/energy to poke at your guide and hopefully make it a bit more neutrally informed, because at the moment a lot of what you're talking about is based primarily in perspective.
That doesn't make it invalid but that doesn't mean it's going to be what's best for the majority.
As you said, the guide is to tell Paladins what to expect, and nudge them towards making their own informed decisions.

A grounded perspective is always a good thing for (WoW Gold)this (I'm speaking as a Guild/Raid leader, and an extremely experienced Paladin in all three schools - Currently MTing).