IIRC, the slopes were set the same on the Cobras and the breakpoint was indeed used as described.
Roush actually did the tuning/programming for the 93 Cobra. They had a limited amount of time to get the tune right - in fact, they only had one shot at the tune to get the car to pass emissions, or the car would have been delayed.
Don't know if that was the case on the 95 Cobra.
The deal with bigger fuel pumps is a pretty new one - I heard it a couple weeks ago on the corral, I believe. I have a feeling it is a trickle down deal from the late model returnless fuel systems - course that is a guess on my part.
What Dale's saying is his is just fine, with no problem regulating his 255lph pump.