Howler,
Very good questions.
It is very quiet(bare string) with virtually zero hand shock, as for speed I have put my bows through a chrono and got high and low numbers,it was inconsistent on the one I used(friends old unit) so I purchased one and will provide that info shortly.
Most of my bows have gone to hunters and to them shoot-ability is more of a concern then speed but I have had positive feed back for both.
I will continue to experiment with different performance core materials other than carbon in the future to find out what the limit is with my design.
Archery is great,always room to try new things!