I've ordered two items that were forwarded through eBay International Shipping and they both arrived at the latest delivery date in the delivery window, although I don't think they spent more than a week at the hub.
My advice/experience is to kick back, relax, and don't check the tracking again until June 17. It really doesn't make any difference where your item is while in transit. The important thing is to receive it or get a refund if it looks like it isn't going to show up.
My thoughts as a semi-reformed tracking geek is that we buyers have been oversold on the value of tracking. It gives us the illusion of control over the shipment and then we get all tied up in knots when we find out we don't actually have that control.
