I'm sorry I must have missed the discussion, but that wasn't the point of my post anyway. I was replying to the question about "eagles being super fast" which they are not, they are average among large birds.
Either way you can't confirm that speed is reaction based when arguments could be made either way. Sure it explains why the pokedex says Pidgeot and Dragonite are fast, but Speed Deoxys sheds its power and bulk to become more aerodynamic so it can move faster. Pokeathon also disagrees with the reaction theory in that high speed pokemon get high speed pokeathon stat so they can run/fly faster. Obviously with some exceptions which goes further to show you can't say one way or the other. Maybe it varies depending on the pokemon in question. Maybe it is all random. But if it has been discussed I don't want to reopen the subject.
If you want to reopen it, then here's my needlessly long post about speed.
It seems to me that speed is more based off of
maneuverability than on how fast the Pokemon can go, atleast for flying Pokemon. Pokemon that can hover such as Gengar,
Lati@s, and Ninjask all have high speeds because they can hover, which indicates that they would have atleast good maneuverability in D&D. Pokemon such as Skarmory cannot hover and therefore would have average mobility or lower. Of course, in Pokemon, Gliscor and Zapdos can hover and I would only consider them to have average mobility and it's obvious that Gengar can maneuver much better than Zapdos and Gliscor.
For evolutions of Pokemon, speed almost always increases even though the Pokemon might actually lose some maneuverability. For example, Pikachu can maneuver much better than Raichu in the anime despite having a lower speed stat. In this instance, you should think of it as Pikachu has above average maneuverability for a Stage 1 Pokemon while Raichu has below average maneuverability for a Stage 2 Pokemon. The Pokeathlon actually supports this idea since Pikachu has a higher max speed than Raichu, even though skill is usually what determines maneuverability in the Pokeathlon. Other evolution lines (such as Munchlax to Snorlax) also have speed stats that are wildly off, by this definition, but they still work in Gamefreak's eyes.
Of course, maneuverability is not the only factor that contributes to a Pokemon's speed; how fast it can go can also contribut to it. For example, Espeon and Jolteon have probably about the same maneuverability, but Jolteon is significantly faster, so it has a higher speed. Another example is Deoxys; the Attack Form, Normal Form, and Speed Form can all maneuver well, but the Speed Form's aerodynamic design allows it to move faster. The Defense Form cannot maneuver as well, and probably can't move as fast, which is why its speed stat is significantly lower.
In short, speed is based mostly off of Dexterity and only a little bit (20 to 30 points) on Movement Speed.
Dungeons & Dragons, helping to explain video games since before they were even created.
(I have to figure out how I can write a term paper on this stuff.)