yes you do the "static ip thing" from you end.
Like i said in a previous post: i didn't update to 6.0.1, because eraly adopters (the kind that i was befor ios6) of 6.0.1, are still complaining about wi-fi, and possibly apple has added insult to injury e.g. they probably made it worst syncing wireless....
I must be honest though: you need to reboot both your iphone and workstation AT LEAST one time before it hangs properly (and you'l have to do it again in the future)....., and then even if the sync is greyed, if it says that it is waiting for your server to be available, just let it nap 10 minutes, it will probably finally establish the needed handshaking
Since my server is in my wardrobe, i don't want to go there to reboot: i use a rdp connection(terminal server) or something else to reboot it....and i have my ios device.
But my goal is same as yours: never connect my ios device to my itune machine anymore.
And here we have 4 windows pc, 2 macbook air, 4 ipods, 2 iphones, 2 ipads, so there's a lot of possible conflicts ... and every ios device is working properly with the syncing...with static and reserved ip addresses.
Obviously the ios5 devices are doing better for the sync....but still, sometimes get the greyed sync button...
WHat i hate is: going to the closet or restart the router, and i don't do it anymore for syncing........my real problem these times is : battery life on my mid 2011 macbook air that i've updated last saturday with mountain lion.....
There's something that tells me Apple is slowly but steady losing its gloss....that's sad