This is an interesting discussion and I'm sure there are many factors that make a bow more "shootable" over another, or that makes for tighter groups. I think the jist of what I'm trying to say is, out of all the variables and factors that account for one bow performing better then another, cam style is rather low on the list. For instance, if I was to categorize items in importance, it might go something like this.

1) Archer's ability to repeat their form and technique
2) Degree to which arrows match.
3) Ability of an archer to tune their bow to perfection.
4) Shooting the perfect draw length
5) Archers comfort shooting a particular release
6) ATA of bow along with brace height (forgivenesss factor)
7) Grip design and comfort matching individual's preference.
8) Draw cycle (most importantly the characteristics of the valley and wall)
9) Bow's balance
10) Bow component quality (high quality for consistancy in the equipment)
....
....
....
123) Bow color
124) Type of cam

Well, maybe you could switch 123 and 124 around, but you get my point. ]