that link doesnt show me the forum. it must require me to register. a simple yes or no to the question would be just fine as an answer.
Once you factor in vehicle purpose, driving style, drivetrain power levels, gears, tire size/compounds, etc, etc... there is a distinct trend. Manu of the guys who've raced and watched it for the last 30 years will clearly see the trend. I've seen tons of undersized stock stuff twisted, broken, and shredded. That's why the aftermarket exists. Shorter, lighter shafts can take a bit more stress though.. so, there's that too.
