bill-i read that even dawkins admits the urey miller experiments lead to a dead end .even the hoped for protein would be inadequate for life.and that is with controlled tests by intelligent creators .
if they come to a dead end it is even more unlikely that life can arise without benefit a creator.dawkins proposes RNA but sarfati in the "greatest hoax on earth" outline the problems in this idea.thats probably as far as i am capable of taking this .

penny-i did'nt spot anything in your link that supports macro change.
as you say the YEC position is of change within types.this of course is not just argument countering darwinism, but noted by creationists before darwin.

pete