Interesting post, POB. As it happens, I was just wondering yesterday whether the 1988 McLaren was very dominant or if it was the perfect storm of Senna and Prost, both close or at their peak, driving a car that was by no means bad but perhaps not as dominant pace wise as the 15/16 strike rate suggests. Do you mind sharing with us how that car compares with the ones in your original post please?
I also sometimes think it was largely the 1988 McLaren-Honda drivers' excellence that was responsible for the team's dominance. But as usual in F1 there are few one-liner answers. The Senna package had a 0.6% advantage, just less than those mentioned above. But still a huge, comfortable advantage.
It is interesting to compare this with, say, the Schumacher/ Ferrari advantages, and those of the Clark/Lotus-Climax and-Cosworth packages. Comparative dominances are more clearly explained by the numbers.