RYSTAN, wesmip1 is posting some stats later in the week on my Radio Tabs thread, should cover most of what you want! for what it's worth I've found that the ratings perse' don't show a profit, but if correlated with other selection methods they tend to sort the wheat from the chaff.

In other words say you have a selection method that is showing near to break even, then you introduce a further filter, i.e. no bet if less than 97 rating (example) you will find an immediate improvement in S/R.