Marc, and Benedikt's comments is what I was hoping to see......although splitting is traditionally excepted as the "correct" way to treat logs, this is not always the case, and good bow wood does not need to be split to make a bow....unless you are a purist.
For me this holds true with hazel, vinemaple, yew, dogwood, ocean spray.
I asked the question about limb bows because the diameter of a lot of limb bows does not let you split the wood, therefore the wood "could" be twisted all the way through the stave, and many bows I have built that were limb bows were....yet they still shoot great, and after some tweaking (limb alignment) never had a problem. Just something to think about.
VMB