Stacko,
Yep, someone from tower did ask today. Seems they have been scratching their heads lately too.
Never heard this call made as routinely at any other aerodrome as I'm hearing it at AF lately.
CS,
I think the words "immediate" or "keep it rolling" are actually used when this situation is required, but happy to stand corrected if AIP or ERSA FAC as to why AF is different to every other aerodrome in Australia can be quoted.
On the contrary, I would suggest checking static rpm limits on a C172 would actually be checked most accurately at as slow a speed as possible, standstill preferrably, but it still doesn't take
that long.
Airwolf,
"So there" does not advance your argument.