Man PA's record book is interesting to look at.........and when you see all the 2002 and forward entries it's hard to dispute that Antler Restrictions are playing a role. [:-]
http://www.pgc.state.pa.us/pgc/cwp/browse.asp?a=485&bc=0&c=69938
Just as an example 8 of the top 12 Typical Archery kills are from 2002 to present!