Whats the difference between 600 hrs. and 1000hrs.? Nothing, theres no reason why a first officer shouldnt be allowed to learn the ropes just like in every profession. Seriously, if your good enough to make it through all your ratings, maybe instructing, then you have what it takes, I am sick of some of these guys thinking they are KING OF PILOTS. NCD here and I made it to the regionals with low, low time(No College Degree) hence NCD and at age 35 while working full time and raising a baby through my flight training. My point is if your good, you belong and if not then go drive a truck. Flying is not rocket science. Actually its quite easy.