RE: speed
To each is own, I guess, when it comes down to this debate on speed/accuracy/....etc. But if I can place my arrows in a 3 inch group from forty yards using just the first pin of my sight because of the advancement in bow technology (ata, speed, quietness, hand shock...etc.), then guess what - my old trusty Bear Whitetail II will definitely be gotten rid of.
If you don't think that bows of recent (that is, the past 5 years or so) will better your shooting performance in every way, then you're lying to yourself.