For ordinary people, the delay would definitely not be perceptible, but for someone with sharp perception like Wang Tao, it was quite noticeable.
And Entangling Roots basically didn't have this kind of delay, because oftentimes, Wang Tao didn't need to command the Entangling Roots. The Entangling Roots were his clothes; he didn't need them to move on their own, he just moved with them. They could fight on instinct.
For example, if Wang Tao was ambushed, he might not have even reacted in his mind, yet his hands had already moved to block the attack—that was the instinct of battle.
The Iron Beetles couldn't do that, they were too big and too heavy. If Wang Tao didn't issue commands to the Iron Beetles, it was like a car without an onboard computer—it couldn't even move. Even if it could move, it would only be because Wang Tao was forcibly dragging it along.
