Daniel:
Let me take this in a little different direction. Arrow speed is a relative term; you shoot your arrow at the intended target and it reaches the point of impact at some time factor later. Let's look at the time it takes an arrow to travel 18 Yds. (54 Feet). At 200 FPS the arrow reaches the intended target in .27 seconds while an arrow traveling at 170 FPS reaches the target in .31 seconds, which is only .04 seconds later. Considering this, I do not feel the speed of a Trad. Bow makes a lot of difference.
If you are relating to forgiveness in a bow, then that is all together different. I have owned a lot of bows from many of the top Bowyers and honestly, if you buy a quality bow (IMHO)I cannot tell a 10% difference between all of them in speed and/or forgiveness. However, a shorter length bow is typically not as forgiving as a longer limbed bow, at least for me. There are short bows out there which are very forgiving and I have owned several but in general, old school short bows were less forgiving.
With bow technology advancements within the last 10 years, I feel you should experiment with many bows until you find the right combination which suits you best.
Shoot straight. Hope this helps.