I can basically confirm this, also from the Grayflag servers.
Petrovic seems to find air targets quite well, on the ground it is very much hit or miss. Infantry seems to be basically impossible, ground targets are sometimes picked up fairly well, sometimes the ground unit *already engages me* with its gun and he can't lock it up.
Unfortunately the Hind crewed with the AI gunner has lost much of its effectiveness.
I understand that there should be a difference to George (from the AH-64), who has much better sensors, but when I as a pilot without a zoomable periscope can spot targets then Petrovic should be able to find them easily. And in particular if these units are already firing their weapons. If tracers or missile smoke is coming from a unit it should be trivial to find for the gunner, in my opinion. I really hope this mechanic get's properly adjusted. I find it to be very much overdone in its current iteration.