Krazyito, on 14 March 2013 - 09:10 AM, said:
I'm not sure. I haven't really looked. Though there must be a reason most sites tell you to be in tiger stance. I can only assume it is to avoid weird conversions with your gear or something when going into serpent stance.
I just know that being in tiger stance your haste is at its natural number, as it appears on your gear. That way it avoids all ambiguous or odd conversions.
That is the reason indeed. Some addons look at your current haste and when they add haste, they just look at the haste on your gear. That means that if you are in serpent stance and need like 300 haste, the reforge addon will add 300 haste, but that's before the +50% from stance so you would get 450.
It is also easier that way to calculate it yourself since you don't have to take the +50% into concideration when looking at gear.