By reasonably looking at the meanings of the words "average" and "generational".
"Above average" means being in the better half of the drivers, no? Being "just above average" would mean being just inside the better half of the grid. 20 drivers on the grid, that would put you maybe in the 7-10 range being generous.
Being "generational" means being the best driver in that generation of drivers. That immediately puts you near the very top since there can only be so many "generational" drivers at the same time. Usually one (in their prime), rarely ever more than two.
There's room for several drivers in between, say from positions 2-6. I would call them "elite". Drivers who can win a championship in the right car, drivers who can lead a top team, drivers who are way above average but who are not "once in a generation". Drivers like Lando, George, Oscar, Leclerc, Kimi, Button, Hill, etc.
