ASL is a language, and as such, there are "dialects". Different regions and countries have different signs and ways of signing. Many consider people from the North to be "fast talkers" and people from the South to be "slow talkers", one can see the same among signers. Also, if you aren't a "native" to ASL, then any signing can seem "accelerated". Yes, there are those who add facial expressions, but they are personal, usually, hard, fast signs, which often produce a slapping sound, are used to convey urgency, anger, and fear. Situations like this can be difficult for ASL because so many things have to be spelled out as opposed to a single sign, and it takes longer, except for those with lightening fingers. People like me, well, I can't spell for shit anyway, but when I have to do it in ASL, I am even slower.
As for the tongue... 
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