BOAC,
I said: The G/S info is pure angle,
You said: Glad you said that. I realise I got suckered in there. I have edited my earlier reply.
Your earlier reply still says: You are mathematically correct, Tree ....
Sorry for the "I said, you said" bit, but it was the easiest way to copy it....
I agree this is almost a TechLog subject, but...
Tree is
mathematically wrong.
If he flies systematically one dot low:
1) He will systematically be following a shallower flight path.
2) His
glide slope aerial will still hit exactly the same point of the runway if he doesn't flare.
Since he's not landing on his glide slope aerial, but on his landing gear, which is a bit lower, basic geometric maths dictate his wheels will touch a bit earlier if he's below the glide slope.
Whether "greasing it on" with a shallower approach and touching down a bit earlier is a good idea is another matter.
The 3° glideslope was not invented for nothing.