Do you ever wonder why, when you walk into a large consumer electronics store that sells Macs, the sales staff are not always very helpful (or sometimes even friendly)? My experiences during the last holiday shopping season gave me insight into why some Macintosh buyers get the cold shoulder from sales staff. I've used a Mac since 1989, and - just before Christmas - I subcontracted with Apple on one of their in-store promotions, called Apple Demo Days