More delay for the 8800 GT

The first Mac Pro with the 8800 GT arrived a week ago, but Apple is still delayed on deliveries of cards sold singly.
An order placed by a member of our team has already taken a month and is now scheduled for March 11.
However, while these cards might have experienced significant shortages in the PC world, they are now being delivered smoothly.
The explanation should be attributed to other reasons.