Here I am again with my figures that you all love so much 
Average winning actual winning BFSP for all UK Handicap Chases over the last 2 and bit years
Year Runners Winners SR Avg Win Odds
2008 8546 852 9.97 9.43
2009 8091 845 10.44 8.64
2010 756 82 10.85 7.87
As you can see a 9% decline 2008-2009 and a whopping almost 20% 2008-2010(so far). Makes a difference over the long run.