Don, I don't know if yew will yield a better bow than vine maple when proper designs are employed, but I can certainly understand why many would favor it. I find the look of a longbow with deep and narrow limbs and an oval belly pleasing and such a design is just not practical with vine maple. Also clear yew is quite pleasant to work creating long satisfying curls when it is being scrapped. Of course, when it has knots, it behaves just like vine maple
The other thing I like about yew is that it requires no stain to being out the natural beauty of the wood - unlike vine maple. All that said, I still like vine maple because it is abundant (at least in this part of the country), it has character, and you can create incredibly powerful and durable bows from it.
Thank you all for your compliments.