Are you referring to kerfing with a circular saw before splitting? If so it works well, even on large sections. Dean Torges book mentions it. Even so he splits the log into 1/4's, with wedges first. If the log isn't straight grained, the staves won't be following the grain.
If you have a straight grained log, but no bandsaw big enough to break it down, then kerfing is a good way to maximise the amount of staves you can harvest.