I read your question in Simple questions: simple answers post. I don't think it is the same in R/S/FR/LG as it is in Emerald, although I'm not 100% (but nobody else has mention it in my extensive RNG studies, so I doubt it is). But the RNG method in Emerald is based 100% on stop watch time, while in D/P/PT/HG/SS it is based on calender time and delay, and then frame on top of that. A little confusing, but Emerald RNG is easier than D/P/PT/HG/SS RNG, because all you need is a stop watch and good reflexes.
P.S. I really though you'd have trusted your scientists with this question, I'm a bit disappointed.