A great push-pull design with great parts & workmanship will obviously beat the pants off a poor ly executed, or ill thought of SET design...and vice versa. The same logic can be extended to any component choice: for example horn loaded drivers versus BR versus sealed box. I tend to view these as means to an end: high fidelity. Often times, the means becoems the end...which is unfortunate. I have seen this in other pursuits as well.People tend to favor one "means" over another.
-akhilesh