Facebook Home users spend 25% more time on Facebook

"Despite some bad reviews, it appears that people are, in fact, using it. In the first month, about one million people downloaded Home, Ondrejka said, which lines up with what the Home team expected (he would not, however, say how many of those people are still actively using Home).
The app also seems to be having the desired effect on user activity. Ondrejka said that Home users are spending 25 percent more time on Facebook, and are interacting with other users 25 percent more as well. He added that there has also been a 7 percent increase in chat usage and a 10 percent increase in the amount of messages that Home users send, on average. And over 10,000 people were so desperate to get Home on their unsupported Android smartphones that they installed a hacked version, Mosseri said."

Source:  MIT Technology Review, 9th May 2013

Note - I'm assuming that this means 25% more time than before, rather than 25% more time than the average