However the trouble with this sweeping brush approach is that it does leave the door open for other broad "interpretations" in a way that a specific measurable predicted quantity (for example) does not.
:) - I keep waiting for someone to deliver on of these other interpretations. :)
I think there is room to keep drilling down into more detail in the same manner. The bird reptile prediction, whale transitionals, fish-amphibian etc. are examples.
ABE I agree that in an uncontrolled non-lab environment each individual piece of data is less compelling (generally anyway - just to wish wash)