I note today that the US has already offered Australia assistance through diplomatic channels (Wikileaks not withstanding) as announced by the State dept.
I must say, to have offered help too early would have looked more like assuming an inability to cope which is obviously not the case. Timing is sometimes a rather difficult area to get right. After all, no one wants to be lumped in the same club as Haiti! (drowning not withstanding!!) I hope this satisfies you that others were not totally insensitive to your adverse weather events.