That would be why I said to run the regression. There as plenty of Statistical analysis that can, and will, tell you whether there is an advantage to one category over the other, regardless of the human error involved. I'm talking about proven statistical methods, there are many, that can do the job, and will tell whether a FLGR is better then a standard length guide rod.
The problem of course comes in that most shooters are either not good enough, or are set in their opinions so much that they refuse to try and prove their case one way or the other. If that's the case then no problem, just don't try to THRUST your opinion on others based solely on the force of the argument, rather than the validity or cogency of the argument.