Talk:Reach/@comment-200.90.186.237-20130823082338/@comment-46.151.136.15-20130824215157

just read

Reach increases the range of a melee weapon's attacks by 15% per rank for a maximum of 60% at rank 3. The range increase affects all attacks, except Glaive throws.

So it doesn't make you throw glaive more further or kill more enemies with it.