SKI Magazine's annual reader poll has awarded Deer Valley Resort the number one ranking as the best resort in North America.  Pick up the October edition of SKI Magazine (not yet released) for the full rankings.             This marks the third year in a row that Deer Valley has been named the top ski resort in North America. Deer Valley earned top honors in five categories including Guest Services, Slope Grooming, on mountain food and dining, and Lodging.             Ski Magazine's subtitle for the resort on Skinet.com reads "The ultimate upscale destination resort. Five-star all the way." Resort president Bob Wheaton points to the staff at Deer Valley as well as the commitment to customer service as the reason for the rating and guest comments like the resort description subtitle back that theory.             Deer Valley edged out Whistler and Vail which took the number 2 and 3 spots in the readers poll.             What effects this may have on the local Park City and Deer Valley real estate are probably negligible. But good publicity never hurts and it is a great reminder for people that this is a fantastic spot to own and the desire to be here isn't waning