As I said, 10-15 minutes seems completely realistic when talking about the sensor stabilized and comparatively slow flight modes.
Most FPV channels that were reporting on the DJI FPV drone and actually tested the completely manual flight mode (which is the only one that really compares to the FPV flying you see in many videos) got around 3-5 minutes out of the battery.
And again, it makes sense when looking at freestyle maneuvers and how much power they require.
