When you ordered the batteries were they on backorder?
I waited a while for the backorder to come in on my order can't remember how long I think 2-3 weeks I was in no hurry though and I will say that I used standard shipping and it came in rather quick I thought.
I guess the thing to remember is do not be in a hurry when ordering from China however the savings are huge I got 5 lipos and a charger for less than what it would cost for a single lipo and half of another here.
While this does not help for this weekend I get your point.
My experience was good keep checking there shipping update