This is one of several recent changes Apple has made to Mac Pro shipping estimates, with the company showing both March and April shipping targets earlier this year. The change from a monthly window of approximately seven to eight weeks to a weekly window of five to six weeks suggests the company is starting to move toward a balance of supply and demand after the initial buying rush at launch.
We may hear more about the Mac Pro and its supply constraints later this month when Apple announces its earnings for the second fiscal quarter (first calendar quarter) of 2014. Apple will hold its quarterly earnings conference call on April 23 at 5:00 PM Eastern / 2:00 PM Pacific. MacRumors will provide coverage of both the earnings report and conference call at that time.