Arthur,
I do agree with your reasoning and to further add something to the post.....
...maybe the correct terminology should be "speed at all costs." Going to a light arrow or going to a heavy draw weight or going to a short brace height, etc... All of these can lead to bad hunting scenarios.
What I do like about today's inherently faster bows is the ability to slap a medium to heavy weight arrow on them and still get the same speed but more KE than a similar bow from ten years ago...<img src=icon_smile_wink.gif border=0 align=middle>. Maybe that is one big benefit from the whole "speed craze".