To the contrary, Olympic was the exception at that time for ships H&W built with 'combination' machinery. She, alone, was completed with a 4-bladed centre propeller whereas all the other ships all had three 3-bladed propellers (counting the ships H&W completed between early 1909 and early 1914).
She was the exception, not the rule.
To quote an earlier post from Mark regarding Olympic I think it is you who is trying to delude people, not Mark. If I am mistaken please provide primary source material to the contrary.