Chad, Rob, and Lee are right on and that's experience talking.
I will say this, and in my own humble opinion, modern string materials have done more to enhance stick bow performance than any new limb design or limb materials. I know that's saying an awful lot and I don't mind being flamed for it but I've owned and shot a lot of bows over the years. I've built bows, repaired and refinished them. I've got a slew of bows built in the 60's that when you put a modern low stretch string on them they become a totally different feeling bow. I don't care if you say more speed, less hand shock, quieter, or whatever. The bottom line is simply performance. If you take that Hill with a B-50 CHEVY string on it and replace it with a D-97 or other low stretch material you'll think you have a MERCEDES all of a sudden. Again, just MHO but that doesn't just come from reading and listening to others.
As far as a "well built" low stretch hurting the bow anymore than a B-50 string, I haven't seen it.