There have been many such announcements over the past three years. Here's one Qatari posted in October 2005:

http://www.qatarliving.com/blog/qatari/rents_to_fall_in_qatar

Since then, there has been 30 percent rent inflation, year on year. And still the announcements continue of a rent decrease just around the corner:

http://www.google.com/search?q=rents+to+fall+site%3Aqatarliving.com

Eventually, even the local journalists might begin to question the believability of official statements.