piatkow - 1:28 pm on Dec 15, 2011 (gmt 0)
As jwolthuis says the extracts displayed in the SERPS can hang around for a while. Also do make sure that pages aren't cached by the search engines.
Joe Public won't understand that what G displays may not be up to date or know what cache means. That can result in complaints direct to you, bad on-line reviews or even unfavorable mention the media.