Heres my take on this. Ive got many different bows of different styles, some old, some new, some cut to center, past center, or no shelf at all but the one common denominator that makes ALL of them accurate, is properly matched shafts for each and every one. Ive yet to find a bow that was NOT accurate, so long as the arrow is properly matched to the bow, the bow is set up correct and consistent form and follow thru are executed.
There are a lot of great bows out there, but none of them will ever shoot to there full potential without the investment of time to find the proper shaft, for it is the properly flying shaft that gets the job done, as the bow just supplies the energy to propel it.