I sought out the article on Wiki again, and this was quite extensive, actually. It had a lot of resources which I would love to investigate further.
The article begins by stating possible scientific explanations as to why we feel repulsive to (especially) almost-human robots. These judgments usually take place on a subconscious level, where expectations play a role.
Though, upon reading further, I came across these design choices that had to be evaluated when you wanted to create a life-like robot. These especially interested me.
1.) Design elements should match in human realism.
For a robot to give a more positive impression, its degree of human realism in appearance should match its degree of human realism in behavior. If an animated character looks more human than its movement, this gives a negative impression. A robot may look uncanny when human and nonhuman elements are mixed.
2.) Appearance and behavior should match ability.
In terms of performance, if a robot looks too appliance-like, people will expect little from it; if it looks too human, people will expect too much from it.
3.) Human facial proportions and photorealistic texture should only be used together.
A photorealistic human texture demands human facial proportions, or the computer generated character can fall into the uncanny valley. Abnormal facial proportions, including those typically used by artists to enhance attractiveness (e.g., larger eyes), can look eerie with a photorealistic human texture. Avoiding a photorealistic texture can permit more leeway.
So, the first statement applied directly to the Guild Wars' Intro. The graphics were expectantly real. So if the movement falls behind, we experience a negative feeling.
To close this interesting topic off, I found this picture on the internet, stating exactly what the 'uncanny valley' is.
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