It is not fast; however, i call it fast, because ESL speakers have weird notions of how English is spoken: they think it is a syllable-timed language.
You need to notice three things when you hear.
(a) some syllables are deleted (syncope)
(b) some syllables are produced fast (reduction)
(c) some are released slowly (mostly, stressed syllables, intonation nucleus and accented syllables that are not usually stressed, but are stressed as when rhythm demands).
Once you notice how all three go together, fast speech is a matter of how (c) is relative to (b), (b) relative to (a).