Masamune conducted the tests (And he's a very reliable/strict guy), so you'll have to PM him for the experimental data. As for the language on the page (For clarification purposes), a strict reading of the page is as follows:
After cRatio has been calculated, there are three stages to determine the final pDIF
1. Crit or no Crit [Debate over whether this is a straight +1 to pDIF or just a change in pDIF equations; BG-Wiki uses the latter]
If Crit => Use different pDIF formula
If no Crit => Use normal pDIF formula
2. Take the value from (1) and cap that value at 3 if above 3
3. Multiply the final value by 1-1.05
I recall 2 and 3 being known for quite a while. The "change in formulas" for critical hits is new to me, but that doesn't apply here.
XI Wiki



