?My question is, do thinner shafts have more of a tendency to bounce of the CB and thus yield less accuracy on some shots??
The answer to that question would have to be both yes and no. First let me replay your wording "bounce" with "deflect." I assume you're talking about when a cue ball deflects off the shaft when the cue ball is hit off center when applying spin? Seems to me, that todays general opinion on deflection goes to the basic idea that when two objects come into contact, one or both of the objects has to give (deflect) a little. Based on experimentation, the shafts that cause lesser cue ball deflection, do so because the shaft gives right of way (or deflects off of) the cue ball, instead of the cue ball giving right of way or deflecting off the shaft. And, it seems the main factor in construction that allows for a shaft to give way to the cue ball on impact is less weight in the shaft end. That is why low deflection shafts like Predator, and OB-1 use construction that reduces the weight at the end of their shafts.
Now, back to your question about "will a thinner shaft deflect less than a thicker shaft?" Well, the yes part of that question is because most likely, if your shaft is thinner, it's probably lighter. However, the no side of the question would have to mean that just because your shaft is thinner, it doesn't mean it's lighter in every case. It could have a heavier ferrule, or the wood alone could be more intense in density..................and heavier.
So, if you're trying to reduce deflection, your answer isn't exactly finding a thinner and more flexible shaft. The general idea is to use a shaft with a lighter end (tip, ferrule area).
dave