I'm not sure how anyone here would have information about pre-orders of the D7100, or the Nikon forecast, but the worldwide economy is not conducive to sales of big ticket items. None of the camera manufacturers are likely to meet their sales forcasts, and they downgrade them every quarter.
Canon has the price advantage with the 60D costing far less than the D7000 / D7100, and, in tough times, that is a huge advantage. Even buyers who can afford more hold back and go for lower priced equipment.