1. In my lifetime, it's one of the biggest letdowns since Gerald Ford pardoned Richard Nixon in 1974. The Nixon pardon was announced on a slow-news Sunday in that pre-internet era.
2. One can't be surprised at the secrecy since the Francis visit was clothed in "people's pope" garments--and seemingly crafted to appeal to those who like their Catholicism centered on big-picture Social Justice (climate change, abolition of the death penalty, curbing rampant greed) instead of inflexible doctrine on gay marriage, contraception, abortion, etc.
UPDATED 10/2/15: Link to the Vatican's clarification of the encounter: