this is a really interesting topic. from working with folks at my dojo, they are not that interested in the whole IS/Aiki thing. so i would introduce some of the IS practices (which i got from Sigman, Ikeda, Saotome and Howie) disguise as body movement and stabilization practices. some of the folks got pretty stable and much harder to throw now. it's hard to introduce the whole IS program, since most folks are not really interested in it. so you just kinda feed them a piece here and a piece there, disguised as something else. I wondered if this was what happened with O Sensei and his students.