Orange Box Old vs. New ??
Also keep in mind that sometimes when people change the ECU (perhaps post #2) the fix might have been due to getting a better ground thru the rusty sheet metal screw. Before condemning an ECU, try running a dedicated ground jumper to the case.
I doubt you will draw any valid conclusions from the small sample of replies you get here. Proper analysis requires careful statistical analysis of large samples. The medical community has been misled many times, which is why what you should eat changes every month.