for the record: What coach is saying is not quite wrong, but it's not quite right either. Normalization does occur over a long enough timeline (10 games is not even close to enough) but it is not forced in the manner he suggests. Every possession is a die roll. It is not dependent on any past die roll, but using probability, if you roll the die enough times, you eventually get close to the expected results. That's the way it is supposed to work.
There's a flip side to that coin: some owners believe there's some thresholds built in to the sim to limit the success of certain owners and/or teams that are doing well. That borders on conspiracy theory, which is ridiculous, but after you've been here enough years, it appears less and less ridiculous. With that in mind, forced normalization is not that far outside the realm of possibility.
I haven't been here since 2002, but I have been here since 2008, so my experience isn't exactly small. I have had some success in those 8 years and have tested many, many mechanics of the sim. My experience says that ben is correct. Do what you will, but the threads he speaks of are worth a read.