As a heads-up, I changed my spec yesterday before raid, but forgot to change the glyph, so I only noticed the OF change. I dont have the actual numbers, since I`m not home, but here is the rundown:
First Boss:
OF procced pretty much every time when the boss start whirlwind (bone-whatever, cant remember the name of it). I was impaled twice, it didnt procced from it. I asked a friend healer if I could step once or twice on the fire to see if it procced, he said ok, I proceeded to do it and warned him by private bind on vent. It didnt procced and I stepped 3 times on it on different situations.
I noticed a small increase in dps from OF, cause it only procced during the whirlwind thing.
Second Boss:
It procced once, when I got hit by the ice thing the boss throws around. I even let a ghost give some hits on me, but it didnt procced.
Noticed no gain.
Gunship:
It procced quite some times, due to axe being throwed at me.
Since I was on boat and I dont have Gale Winds, it really didnt matter at all. Maybe if I were one of the peeps that went over the other boat it could make some difference. But...meh, stupid boss is stupid.
Fourth Boss:
Since it was me and another Moonkin, we stood in the middle for Typhoon, quite near each other, so we got hit a lot by the blood thing. OF procced some times, forgot the actual number. I did noticed a boost in my deeps, but not so great. What I noticed was that the use of Typhoon didnt matter so much this time to my mana.
That was it for yesterday. After that, I left for better geared ppl so they could get progression bosses/wing done. Maybe next week I`ll be able to do some more tests, but, from what is worth, removing GW and getting OF can give you a bit more dps.