MeD'S SERVICE STALLS AT DRIVE- THRU Survey shows decline accuracy, speed; some franchisees blame menu changes BY JULIE JARGON Drive-through traffic is snarling McDonald's service- improvement campaign. Oak Brook-based McDonald's Corp. ranked last out of 25 fast- food chains in a recent study of drive-through order accuracy, down from 20th in 2004. When it comes to drive-through speed, McDonald's went from being the fourth-fastest chain to the sixth, according to a widely watched survey by QSR Magazine, an in- dustry trade journal. McDonald's franchisees polled about the results by New York-based equity research firm . Buckingham Research Group as part of a separate survey re- leased last month blamed the problems on new menu items and pressure from Oak Brook to speed up service at the drive- through, where McDonald's generates 60% of its sales. Mc- Donald's goal is for customers behind the wheel to wait no longer than 90 seconds-a long drop from the average 167.9- second wait time QSR clocked See McDONALD'S on Page S