Gran Turismo 5 is quickly becoming the PS3’s most anticipated release of the year. Soon after Sony revealed the official release date for the racing sim it’s sales rank sky rocketed some 1300% on Amazon.com. Today UK retailer ShopTo.net announced that all of their warehouse staff are coming in over the weekend and working double shifts in preparation for GT5’s release. Could Gran Turismo 5 detrone Call of Duty: Black Ops as the best selling game of the year?