The statement in his book was of course a straight bow with curved ends. Hill sometimes, when looking at his films, had a shorter release. Sometimes he had a rather violent release. With a recurve, these variations could show up in the arrow flight. Longbows do not have as much variation in arrow speed with variations in draw length. My own test showed a high quality recurve that jumped 8 fps with an additional inch of draw and 8 fps loss with and inch less of draw. Compared to a longbow that had only 4 fps variation. The recurve was faster at all draws than that same weight longbow. I had to use a light grip and a straighter arm to get that recurve to shoot tight groups and it took a more time consuming effort to get it on target. It would have been a good bow for shooting at a standing deer from a tree stand. But with that stupid slow longbow I shot lots of bunnies, a few pheasants and a few deer, all while sneaking around seeing what was over the next hill or down there around the bend in the river. If you shoot a pistol grip recurve with Howard Hill technique, you will not like it. If you shoot a Hill longbow with Olympic target shooter technique, you will not like it. However, when you find a Hill style longbow that shoots an arrow as fast as that recurve, you adjust to it and never look back at the recurve again. The best of both worlds is a good place to be.