NEW ORLEANS -- There is no statistic for quarterback-receiver chemistry. Jerry Rice knows it when he sees it, however, and the San Francisco 49ers legend definitely does when he watches Colin Kaepernick and Michael Crabtree working together.2012 Michael Crabtree Receiving"Crabtree and Kaepernick, they have that swagger," Rice said from the media center at Super Bowl XLVII.Kaepernick and former 49ers starting quarterback Alex Smith targeted Crabtree on a similar percentage of pass drop-backs when looking only at plays when Crabtree was on the field.