I agree with most. Put in a machine almost every bow will shoot the same arrow in almost the same hole repeatedly. Some just do it faster than others. Given the human factor things can change. Depending on the physical characteristics of each bow, some just make it easier to duplicate shot after shot. That's why most GOOD target shooters are toting around longer ATA, deflex risers, high brace, round wheels, and lower draw weights.
When it comes to the bows most of us shoot it's much the same. A lot of the bows will just shoot more accurately, easier, and more consistently. Of course a lot can be said for buying a less pricey bow and spending the difference on MUCH better accessories. And take some of what's left and get some good coaching lessons.