Siegmund, on 2012-August-28, 18:27, said:
The long-clubs meaning is the one in all the old textbooks and most of the new ones. Twenty or even ten years ago I would have expected it to be the 90+% answer in this kind of a poll.
Having alternative ways to show the medium club hand (people playing 1S-pass-2C as GF and 1S-pass-3C as 8-10 with six clubs, for instance) is a very new trend. And from previous threads, "1D-1S-X is exactly the same as a 1H response" is a remarkably popular view on the forum, much more so than in real life anywhere I've been.
Why are you including uncontested auctions in this thread about negative double treatments? Did you just forget the OP?
I prefer the negative double to guarantee 4+ hearts, and that systemically requires me to describe other hand types, like long, weak clubs, to pass initially (though some system of transfer advances is also very playable). Invitational + hands, of course, still bid naturally.