I'm just gonna get this topic back on its, well, original topic.
Taken from our hero himself, David Belle:
"It's something to help be more open and free to the outside world, and not be invaded by the city's infrastructure."
"It's about being efficient and getting there as fast as you can."
If walking a straight line is fastest and you chose that option out of many others, it is parkour.
Disabilities do not affect someone's ability to "do parkour." As parkour is more a mindset than it is a set of rules and techniques.
If a 10.6 second (or whatever) 100M is the fastest your body can possibly achieve, does that make it less "parkour-like" than someone who runs it in 9.8 seconds? No! And therefor we cannot, and should not, say that parkour is limited by the traceur or traceuses abilities. Yes, they can train and improve their ability but there is no perfection to parkour because it changes depending on the person who is practicing it.
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Now back on the topic.
I have noticed that almost every game has a very shoddy acrobatic make-up. It's high-time that someone put some more effort into making it look and feel more authentic.