With all the hubbub about rage normalization and whether it's necessary, I think it's worth looking at performance data from TBC and WotLK. All examples here are based on 99th percentile parses - more or less the apex of what classes are capable of.
TBC Raid Tiers:
Serpentshrine Cavern / Tempest Keep - Fury at #3 DPS, ~5% behind #1 DPS, ~20% ahead of #10 "Middle of the Road" DPS
Black Temple / Hyjal - Fury at #1 DPS, ~2% ahead #2 DPS, ~15% ahead of #10 DPS
Sunwell - Fury at #2 DPS, ~2% be
