FYI, the phrase "quite some users" is not uncommon among (continental european?) non-native speakers of English, but it's not correct.
"In the British National Corpus, for example, most examples of quite some are "quite some time", others are "quite some distance". If you replace "quite some" with "a considerable", the meaning should be clear.
If the sentence does not make sense when you do that, it's likely that "quite some" is not being used properly."
"In the British National Corpus, for example, most examples of quite some are "quite some time", others are "quite some distance". If you replace "quite some" with "a considerable", the meaning should be clear. If the sentence does not make sense when you do that, it's likely that "quite some" is not being used properly."
From http://forum.wordreference.com/threads/quite-some.1011589/