King James Bible Quotes

Just a quick thought: have you noticed that when even some anti-KJB people quote scripture from memory, they use the Authorized Version's reading?  I just finished listening to a 30+ minute commentary on a particular issue dealing with the Roman Catholic organization by a person that is anti-KJB and every time he quoted a verse (it was from memory as he didn't have a Bible in front of him) he used the King James reading: Gen 3:15, John 3:16, Romans 5:1 and others.  Isn't that a bit strange?  Maybe not, but I don't think I have ever heard anyone quote John 3:16 from the ESV or NIV.