Kenneth G. Wilson (1923). The Columbia Guide to Standard American English. 1993.
bunch (n.)
meaning our group, as in Shes not a member of our bunch, is archaic today. All other uses of bunch meaning group, as in a bunch of the boys, or a lot, as in We had a whole bunch of problems, or a good deal of, with a mass noun, as in a bunch of trouble, are Standard at all Conversational levels and in Informal and Semiformal writing as well. Most count nouns, as in a bunch of flowers or bunches of daisies, are Standard with bunch(es).