Apple has lowered the estimated shipping wait for new orders of the third-generation iPad placed on its online store. While the wait for new iPad orders had ballooned to 2-3 weeks just days after Apple began to accept pre-orders, that wait is now quoted at 1-2 weeks, a quick turnaround when compared to the iPhone 4S launch last fall. While Apple announced record-setting launch weekend sales of over three million units yesterday, the company appears…