After reading this, I just tested mine for distance, I would say it goes 30% more without any drop out. (I do have FPVLR antennas) Before the firmware was updated I could still see the video but the telemetry would cut out at 4000' or 650' up.
Since the fw update my camera drops its connection constantly. When it does drop the camera cuts out also. Then it starts again. The old fw was better for me. In a 16 minute flight I had 8 clips instead of 2 or 3 5 minute clips.this is not good for me. My TH performs great, my camera doesn't.
In that case, I'm thinking they adjusted the drop out time before the RTH kicks in way too aggressively. If I lost some signal before due to trees or mispointed antennae I could walk around to reposition the controller and continue the flight no problem. Now if I loose signal briefly it kicks in auto return home and locks me out until it's come a long ways back, even though bird is in clear view in the sky.
In your case you probably had uninterrupted signal the whole time and your antennae pointed spot on.