Ship times for Apple's latest generation iMac slipped to four to six weeks for the 27-inch model and three to four weeks for the 21.5-inch model in some European Apple Stores. As noted by MacGeneration, these changes first appeared in France on Monday. A quick check of other European stores suggest this delay affects most of Europe.
Unlike the iPad and iPhone which sold like hotcakes, Apple's Mac shipments in Q1 2013 slipped by 700,000 units. This decrease was attributed in part to cannibalization by the iPad. Supply constraints also hindered Apple's ability to deliver the new iMacs in a timely manner. "We believe our Mac sales would have been much higher absent those constraints," said CEO Tim Cook during the company's latest earnings conference call.