gn_wendy - 9:24 am on Mar 30, 2010 (gmt 0)
no, not the head as in first page - but the head of the searches.
keyword "credit card" will get a couple of million hits
keyword "fluffy pink credit card 1st canadian bank of texas" will get almost zero hits
even though longtail terms are searched only a fraction of terms in the head, a majority of searches are into the longtail.