Follow up:
I finally got around to doing that timed comparison and the results were less than stellar. Seems that even with the Winterfall repeatable quest available, I was still able to get comparable numbers just killing the lower level Deadwood furbolgs in southern Felwood.
(note: test performed with a level 60 Tauren Shaman spec'ed Ehancement / Restore)
The "Winterfall Activity" quest combined with all the furbolgs killed to complete it totalled 165 Timbermaw rep over a period of exactly 15 minutes (timed from clicking accept until clicking complete). Simply farming the Deadwoods of southern Felwood came to something in the neighborhood of 150 over 15 minutes. Naturally there are a variety of factors -- class (a class with AoE could likely mow low level furbolgs down by the dozens), competition (I was one of four people in Deadwood Village when getting these numbers, but I also got every spawn of Overlord Ror during that time), as well as factors that don't impact the numbers but might impact the decision of what to do (such as loot). Frankly, with pretty comparable numbers AND better drops in Deadwood Village, I'd probably still just go kill the low level furbolgs there rather than do the Winterfall quest (unless it was being heavily farmed).
Some numbers in the event you care (timbermaw rep returns @ 60):
- Deadwood Furbolg (south) = 5
- Deadwood Furbolg (north) = 5
- Winterfall Activity (quest) = 75
- All prior repeatable quests = 5-7 (not even worth doing)
As for getting rep with *other* factions, I will try to record my numbers as I work on Argent Dawn and Thorium Brotherhood, in the event that anyone is interested.
-X