Ahrael, your "arguments" are creeping over into Retard-territory, again. 😛I just gave you Canon proof of Vader's speed being inhibited greatly by his armor and prosthetics, so be aware of that.
You gave proof that his armor weights a lot, not that his speed is reduced. Within the same book he gets used to his armor and readjusts his style. His single swing knocked two Jedi over, that's how strong he was. Such strength is more than sufficient to move as fast as others despite heavy armor. Moreover, in the same book he blitzed other Jedi. This is canon proof that his weight of armor doesn't prevent him from being as deadly as ever with lightsaber.
Except for his physical-showings in A New Hope. 🙄
🙄
And Ferus Olin's account of Vader's "speed" is inconsistent, because during his time in the Order, he would have seen a few Jedi, a physically-prime Obi-wan Kenobi among them, being able to move much faster than Vader.
During his time in order he personally knew Anakin and Kenobi and participated with them on the same missions. So basically what you just said is void.
As for old Kenobi you still haven't provided any evidence that he got slower. Yoda was in far worse condition, he couldn't even walk properly, yet, his speed did not suffer from it.
This:
"Executing a move of incredible swiftness for one so old, Kenobi lunged at the massive shape. Vader blocked the stab with equal speed, riposting with a counterslash that Kenobi barely parried. Another parry and Kenobi countered again, using this opportunity to move around the towering Dark Lord.
They continued to trade blows, with the old man now backing toward the hangar."
Vader matched Kenobi's speed and nearly killed him with first counterattack.
I was however, going off the earlier hypothesis of a few others, that Marek was apparently lacking in skill, due to his showings.
The only thing that was apparent from the book is that his opponents were immensely powerful in their own right.
His first opponent - Kota could literally reflect any Force attack including lightning. Moreover, he could block lightsaber attacks and dodge telekinetic projectiles while Force choked. In comparison look how helpless Kenobi, Anakin and Dooku are, when Force choked.
And Shaak Ti on her death gave Force explosion, which is not even common for lightsiders.