First off, the news didn't say anything about the size of the R/S. Only that the A/S was going to be lowered, which might be an attempt to soften the blow. They could have also not lowered the A/S, which wouldn't mean that the R/S ratio was going to be 1:1, right? (-:
Anyway, as to my guess about 1:1000, it's just that. But it's based on what might almost amount to a minimum that trip zeroes reverse at. It could also be 1:500. Lower than that, would be good.