Not a problem really....simply that it looks like on normal (say <1.4 G landings) below about 50ft RA there's a gradual pitch up leading into the flare which seems on average (777-300) to lead into a defined 2 degree flare starting at 30 ftRA or so. I was wondering what role ground effect has in that. It's not a problem so much as a query. The Boeing FCTM says to flare at 20 ft wheel height which (depending on actual pitch etc) is only about 15 ft RA and yet it seems that FOQA shows that most pilots are beginning a gradual flare sometime well before that. Personally I'm looking well outside then and until this airline had never spent much time wondering about it all.