Many Airlines now have a operating procedure (that Ive read in the Industry Journals) that hold the gear as long as possible. There is a lot of Fuel Savings by holding the gear. Lots of gas ate up once you put the sneakers down.
At the Test Lab here at Boeing Field the 747-8 Test Bench I work at has a great view out over Boeing Field, I also have SEATAC approaches (when landing south) and its amazing how many dont have the sneakers down passing over us. Once in a while I see them coming down and sometimes I see them already down. Depends on the airline.