I guess it comes down to how your work your numbers. I make 2-3% on turnover year in year out, BUT if I calculated my overall % profit on actual risks taken, it would be around 100%.
Today as an example, a very slow quiet day, I made an ok 3.32% POT, yet profit on risk (if every race was won by my worst result) was a huge 236%, as I had many races where I had no risk at all..