by Byron Mudry on Sep 09, 2007
Faster Leveling
At BlizzCon it was announced that soon we would all be able to level faster. Drysc made several comments in the forums clarifying several details.
The leveling curve and quest experience decrease/increase (respectively) will not be in the 2.2 patch, which is technically the next patch. If you're asking will it be in the patch after that, we haven't announced exactly when the feature will be included just yet.
The increase stops at 60 for both reduction in XP required for each level, and quest XP increases, so if your alt is 60 then you should just level them now.
You can read all the details in the thread here.