In IDEA 3.0.x when I did an introduce variable on an expression like "getChildrenReference()" among the suggested names is "children".
Current EAP only considers the trailing "camel" words, i.e. "reference" which is useless for me in many cases.
It's often true that the prefixes are attributes describing the suffix, e.g. "localPosition", where suggesting "position" makes more sense than "local".
However I also have a lot of names like "positionInContainer" where currently there isn't any sensible name suggestion.