No, I use 2/3. This would definitely be the best for min maxing. Even only a single starfire crit with owlkin frenzy per minute will increase your damage more than genesis would. Genesis is roughly like a 10 dps increase for me, maybe a bit more raid buffed. A single starfire crit with owlkin frenzy per minute would be 10% of whatever you hit for /60. Of course, you're bound to get more than one starfire off during owlkin frenzy. Foofy I don't care if you try it, that's your loss. I'd probably say it's better to try it now while content is a joke than to wait till heroic ICC when you will be more bias about your decision. At your level of gear I'd say you're critting enough and have enough intellect to not have to worry about mana that you could even drop 1 point into it taken outta moonglow. You may raid typhoon for saurfang, idk.
I actually have had typhoon since Naxx. I enjoyed typhooning people to their deaths. The Moonglow was there for the extra haste I'm gaining in ICC since we're going to become haste heavy again, even with large amounts of crit. I tested out owlkin several times. I gave parses. To this point its more of a waste of gold to me and fun. Who doesn't like to Typhoon people to their deaths? Sure, we can't knock them off mounts anymore but seeing a flagged warrior on a high area, sitting...easy kill. Or a hunter who thinks I didn't see him shadowmeld on the top of the WG keep.
My main point is, not everyone will have the same outcome as you. Telling people they should get it with no math of your own to back it up is where I am coming in and stating such. I don't mind if civil banter happens, but as soon as someone tips the scale and starts with name calling; I'm stepping in and putting my hoof down.
Edit: I forgot to add on another raid use for Typhoon. While many people use it (Me included) for Saurfang, its also great for Heroic 25m Anub'arak. A glyph'd typhoon to keep the adds from being knocked back is almost a 100% NG proc. That extra haste with a hurricane on the adds is a great thing to have. Of course, now I knock them back on purpose to mess with our tanks. :D