Eh Simpsons are a generation before me really. I'm apart of a Family Guy generation to be honest. Watched my fair share of the Simpsons because of my sister (4 years older) though.
this is where i believe they need to be looking. both the side effects as well as the general size and speed of the current players. i think both are factors, just how big of factors is the real question. i think the same study found little to no cte in people who played at levels through high school. then it went up for those that played through college and went way up for guys who played in the nfl.
How do you conclude it's the size & speed of the players? By definition you have more and more "hit mileage" as you go through college and the NFL. More hits = more damage and doesn't speak to size and speed. I mean it makes sense that it could be a factor, but less CTE in college and less in high school doesn't tell you that's what it is