From the 2.3 patch notes...

#0 - Dec. 12, 2007, 9:49 p.m.
Blizzard Post
"Players will now be able to cast spells for free in the Battleground before it begins."

Isn't this supposed to apply to spell reagents as well?
#2 - Dec. 12, 2007, 9:52 p.m.
Blizzard Post
Q u o t e:
"Players will now be able to cast spells for free in the Battleground before it begins."

Isn't this supposed to apply to spell reagents as well?


No. It works the same way as it does in the Arena. If you want to use a spell with a reagent such as a group buff, it will cost. Otherwise, there is no mana cost associated with casting pre-match buffs or casting just after being resurrected by a Spirit Healer.