We didn't get into this side of the sport for speed, but comparing two bows that are otherwise equal, most if not all people would choose the one with higher speed, so speed is a legitimate factor to consider.
The bottom line is that we want the bow that will get the job done best for us, whether the job be putting meat on the table or winning a 3D tournament. Speed is only one of the factors that get the job done. OTOH, most of us have come across bows that are just too slow for no explainable reason, even compared with another bow of the same exact model and specs, even some made by top bowyers, and we don't want those either.
It was mentioned that Black Widow was not the fastest recurve around. The reason for this is not because Black Widow can't figure out how to make a fast bow, but because they want their bows to be fast, forgiving, and reliable, and like every other bowyer out there, they are trying to design a bow that offers the best mix of the three. They purposely set the grip forward, because that helps to eliminate problems with bow torque, knowing that a forward set grip is also going to slow down the bow, because it means that the brace height is going to be higher than it would be if the grip was more in line with the riser. Of course, they attempt to make up the speed loss by design changes in other areas, but there really is no such thing as a free lunch. People who buy Black Widows (or any other bow) buy them because they think they will get the job done better than whatever alternatives might be out there.
I'm not trying to promote Black Widow, but all bowyers face the same design compromises, and it seemed as good an example to use as any.