a german saying in regards of motors and engines in general is "kraft kommt von kraftstoff" losely translated it means "power/performance comes from fuel" so the engine has more thrust, the thing is faster. so you are paying this better speed and engine power with fuel^^ this is normal
i had also to get used to the "fly there, drop bombs, go home". its a differnt air plane with a different set of tactics, skills and other advantages/disadvantages.
but as other already stated. go up higher, retract flaps, reduce engine power abit for flights to the AO