Bedrockgames
I post in the voice of Christopher Walken
I did the math a long time ago and it moves the average from 3d6's 10.5 to about 12.something. I wrote a program to compute it on a Compaq hand held running Windows CE 2.0. good times.
It was my impression that few people played D&D with straight 3d6, as it was just too swingy. Except for really die-hard old-timers.
My point was really to Celebrim's that nobody actually likes random generation. It's been working for us for over 20 years. I don't hear that much complaining really.
Keep in mind 3d6 is the method used in 2E, but in 1E the default was 4d6 drop the lowest.