This was done with my level 76 Rogue while following the last 25% of my Dragonblight Guide.
- This was done with no consumables. Just normal poisons applied on weapons and bandages/ normal food to heal up when needed.
- No rested xp.
Also, it can probably go faster with other classes, like hunters for example, as they never need to drink nowadays (I had to bandage and eat many times with the rogue, which slowed me down of course). So you can imagine how fast you can level while following my guides.
Why do I post this? Well to prove that my guides are better than any other addon like Questhelper. It's quite simple really. Questhelper is a nice addon, but it can't optimize your quest circuits nearly as much as what I've achieved through hard work. It can't think 3, 4, 5 or sometimes 10 steps ahead. It can't think of quests coming from remote quest hubs which have synergies with other quests you already have. And more importantly it doesn't tell you tricks that make certain quests much easier.
This is the reason why I still write guides, because I know (and I can prove it), that they are still a much faster way to level. If it weren't the case I wouldn't bother writing them and would also use an addon.
I challenge anyone to come even remotely close to such XP/rates with only using Questhelper (or any quest tracking addon). And I know it won't happen, because I've tried it to, and I know the limitations of those addons.
Of course, when you follow my guide the first time, you might not get such high XP/rates, because you won't know my circuits as well as I do. But there won't be that much of a difference, because my WotLK Guides are very easy to read, most steps are one-liners. I've really worked hard on that too.
It will also depend on your class and gear. The rogue I used on this circuit is very well equipped. But you know, a hunter or a DK in full quest green/blues can probably beat this score :P And other classes too I bet.
In any case, I'm sure anyone can get close to 500000XP/hour while following my guides, even if you are a slow reader. That means one level every 3 hours / 3 hours and a half. And that's really amazing in the 70-80 bracket.
Oh, and just a little bonus. While recording that XP/rate, I also got the following two achievements:
So yea, if you're still thinking "lol questhelper is fastest", well I don't think I will ever be able to convince you, because you simply don't want to be convinced, more than anything :)