Yes, 'Xmas' raised this point too. Split grade printing is great for getting your filtration and exposure matched to the negative and gives you the best 'correct' starting point, so any D&B manipulations you make thereafter are 'interpretive' rather than 'rescue'.
Originally Posted by jeroldharter
However, it doesn't give you a filtration that you couldn't get (if you knew what it was) by dialling it in, although it will give you more control than half grade filters.
however, it also allows you a second level of control for local contrast adjustment, as you can choose to dodge during either the Gr00 exposure or the Gr5, thus altering the ration of the 2 filters exposed to the dodged area, thus lighteneing and shifting contrast up or down simultaneously.
There really is no point in using anything but the 2 extremes of filtration for this though. It will give you everything in between (this is the basis of the Heiland split grade unit). Using 'no filter' and a filter just narrows the range available to you.
The point about bleaching is that it is a different tool and can do what split grading cannot do, so each have their place and can complement each other.