I wonder how much must you practice to pull off the full super parry [...]
Not much, I've done it before with relative ease. The problem at hand isn't really parrying the entire move: it's knowing you HAVE to do so to save your ass in front of a shitload of people, knowing you're being recorded, and still feel calm enough to pull it off. Also, the last hit is a trick shot -- it's gotta be parried high or in the air, trying to duck it gets you hit and there's not nearly enough time to run away from it.
yeah I was about to say, I saw this vid wanted to see how hard it was to parry not having played third strike asked my friend how to parry,I was able to do it decently consistently after 10 minutes, the hardest part is the first hit, and yeah the pressure, holy crap, if I was playing for money in front of a shit load of ppl against Justin there is no way I could do this, same goes for most ppl.
Im still waiting for the day when somone ex guards 3-4 hits of lens j. 2C, in tourny FTW.