This is an interesting piece of the conversation, both for us on the forum and for Adams as a builder. Miel says that the European players generally want longer slides. As with John, my impression was that Europeans would be playing sharper. But it is also possible that the Europeans have a different approach to playing and that causes them to play a given horn sharper than you or I might.
My "short" slide was modified at the piece that comes just after the inner legs; they made that one piece (well, two, if you count both sides) a little shorter. The group I play most often with seems to drift sharp, but I have never had to push the slide all the way in. That's funny, because the short slide doesn't look all that different - maybe 1/8" or so visually.