I'm running at about 1 in 25 to 30 hrs three this year each time the same flying school (big well known organisation too) they teach a lot of commercial pilots so maybe these guys have got their heads down practicing IFR. It does make me apprehensive in case I miss seeing one until too late. Always ask my passengers to keep a sharp eye out, its good to have to pairs of eyes on the job even if they are in the same aircraft.