i have corresponded with jeff moore via email periodically about jujutsu and the arts in general. hes a good guy, who will help you alot.
however the "original" art of yoshin ryu jujutsu is lost, this is a "recreation" of sorts. as best he can calculate this is close to what the actual first style of yoshin ryu could've been like. i dont know any of it, but i hear its very good as far as jujutsu goes. do not be fooled into thinking you are studying "koryu" or an ancient ryu from feudal japan. again, its similar to studying pankration with jim arvantis...its a best guess recreation.
but i like to think, the techniques aren't what make an art what it is, its the underlying principles. if you read the history of the art on his website you will know what i mean..."ju" means to yield to force and redirect it, not try to stop it...etc etc.
what i like about him and his yoshin ryu is its taught in a traditional manner, he also teaches samurai weapons (sword, staff, knife (tanto) ..but older "jutsu" versions of throws, but he also teaches more modern judo versions of them as well. right along side of each other.
so i would call it traditional jujutsu, but not neccessarily classical jujutsu, meaning its not an "authentic" ryu-ha from feudal japan. good stuff nonetheless.
the closest thing you will find to classical yoshin ryu, is hontai yoshin ryu, or one of the branches of takagi yoshin ryu as mentioned in an earlier post. these are old classical systems. there has been some debate about which of the three are "real"..3 people all claiming to be soke of the ryu...but in reality they are all true, they all teach different lineages of the arts, even though the names are the same or very simelar.www.genbukan.orgwww.skhquest.com
(stephen hayes has a home study program for takagi yoshin ryu as taught to him by masaaki hatsumi sensei)www.hontaiyoshinryu.com
..geez i just realized how old this post was...oh well..hope it helps