Stephen Tu, on 2024-March-29, 08:30, said:
Well, all I know from playing NABCs recently is that I encounter a hell of a lot more "K = power lead", Q from KQ than the old way, when playing the NABC+ events. From reading on bridgewinners I think the uber-experts are mostly "Rusinow from 4+ cds" for the KQxx/QJ9x type holdings, but whether Rusinow or "std with ambiguous Q" is more popular among lesser players who play K=power I really have no clue.
You either have a better memory, or are more observant than I am, and probably both, but I don't remember what my opponents were leading whenever I've played in an NABC. And I usually don't look at the opponent's card for leads but ask if I need to know. Frankly, those honor leads come up so relatively rarely that I would have to keep a written tally to see what is more commonly encountered, but that's me.
I will note the Bridge World 2017 just says,
Against notrump contracts:
(i) Honor leads: highest equal from sequences and interior sequences
They must have run out of steam when asking poll questions about leads.