Definitely helpful and interesting and wish I realized how weight would impact my throws prior to purchasing at least a dozen discs. Since weigh does make a difference for those of us who cannot throw with the preferred speed, it might be best to throw a lighter disk when driving and the heavier ones when we are closer to the basket.This is what I have to say about disc weights.....my opinion, but based on using different weight discs.
1. Most videos discussing disc weights are by pro discers that can throw a 180 gram disc at 60 plus MPH. Like the disc should be thrown. They aren't going to see the difference those of us who throw slower see. Maybe the lighter disc flips for them = but they won't see a big difference since they can throw a disc the way it should be thrown.
2. I throw 42ish MPH (based on hand held radar gun). If I throw a 172 Kastaplast Falk (9 speed), it flies about 255 and takes a hard left fade (I'm RHBH). If I throw a 165 Falk, it flies about 280 and has a slight left fade. Total difference. And that was when I was first working on my backhand form with my instructor - I'm getting more distance now.
I now throw 160-165 8 and 9 speeds, 150-160 10 and 11 speeds, and I have a 137 gram 12 speed.
I have 3 MVP Waves (11 speed): one is 174, one 169, and one is 157. I also have MVP Volts (8 speed) in different weights. I test all my differnt weights in a field every two or three months. With the Waves; the 157 one goes the furthest for me and flies closest to the numbers. BUT, in a decent wind, I won't throw the disc as the wind will affect it too much. The 169 disc and 174 disc don't go as far as the 157 one and they fade harder; with the 174 one crashing the hardest.
So take that as you will, but my experience shows weight does make a difference when you have a slow arm speed.
It seems that most posters here recommend weights in the 145 to 150g range. Anything lighter would less predictable so I should probably order a Pro Leopard at 147g which I believe to be a 6 speed and try that out as my driver, however I'm always open to other opinions!