BS.
There is no evidence in the article that the survey included questions as to WHY respondents answered the survey the way they did.  The conclusion that workplace pressure is the reason behind desk-lunching is a wild leap without further statistics to make that connection.  IMO, the reasons behind the survey result are manifold; not simply the increasing pressures of daily life.  E.g.: the increasingly exhorbitant cost of a resto lunch; having a desk-lunch is an opportunity to chill during the day, having a home-made lunch is a healthier choice than restaurant/cafeteria, etc.