From what my 40+ years of studying the clipper design has revealed to me, is that, to some degree mask rake coupled with the hulls entry and exit features was part of the experiment in gaining the most speed from the vessel.  There are examples of clippers with zero fore and main mast rake and only 1 degree on the mizzen...while other designs employed over 2~3 degrees on the fore and main and more then that on the mizzen.  Smaller schooners and Baltimore/Boston clippers had an excess of 5 degree