By Abhinav Parmar and Lisa Baertlein (Reuters) -United Parcel Service posted better-than-expected quarterly results on Tuesday, in an early sign that its overhaul, which has included cutting 48,000 jobs this year, is making headway after several quarters of weak demand. Shares in the world's biggest parcel delivery firm surged nearly 13% in early trading, with rival FedEx also gaining almost 3%. UPS shares had been down about 28% since the start of the year. The results signal progress in UPS' efforts t ...