the basic premise of the short arm is that it's just taking a putting form and switching to releasing closer to the body rather than at full extension. it adds quite a bit of finger spring and also eliminates a timing variable.
the version i teach on the article is basically dave feldberg's putt (under-hand pitch putt).
http://www.discgolfreview.com/resources ... erg2.shtml
kevin mccoy, avery jenkins, brian schweberger, cam todd, etc. are other examples of this.