Ithaca, you won't find very many international skeet shooters shooting anything with a splinter FE either, so you needn't pick on Zutz on that score. The Brits, who pretty much refined the "game gun" concept, made a lot more guns straight/splinter than any other way.
As for hand movement, I just pulled out 3 guns (Army & Navy, Miroku Model M 12's, BSS Sidelock 20), all straight/DT, stuck in snap caps, and dry fired them. Hand movement in every case. Very slight, but it's there. In fact, if I consciously try NOT to move my hand very slightly when shifting triggers, it feels wrong. Could be other people will get different results, and it could be people outshoot me because I move my hand a little. But I've been shooting DT sxs for 35 years--several hundred different ones, in fact--so I'm not exactly new to the genre.
