I don't think this one panicky guy is representative of "the 600hr CFI" or other 600 hr pilots. Some are definitely more experienced even at the same amount of TT, some could be even worse than this guy. I had several hours of single pilot IFR in the NE by the time I reached 400-500. I have a CFI friend who is at 800 TT and has 25 actual hours just because of the region he teaches in. It just all depends on each individual.