Yes, it is as Dani Filth said.
First table shows average time diff between drivers. Points are just a graphical representation of it, to get a more intuitive look to gaps.
Second table is average diffs between teams.
Third table shows average diff between teammates and how is the score between them.
Calculating average diffs in grid times is not straghtforward mainly because there are "no times" due to accidents, voluntary retirements, mechanical troubles, in this one-lap format.
Another complication arises because lap length (time wise) is diferent in each curcuit, so one second gap is very different in Indy that in Spa. This factor is commonly overlooked in average grid differences. I "noramlize" every grid time as if pole time is 1:20.00 in every circuit.
Another point is how one must do the calculations to extract the maximum info from data. If one driver makes a mistake and ends, say, 7 seconds slower than normal, if we just do the arithmetic mean, his average will be greatly afeccted during all the season, no matter how good is him.
So it is better to count each time with more or less importance according to if it is "anomalous" or not. This is tricky but can be done automaticaly in a reasonable way.
Obviously in the current "strategic" one-lap format, grid times are nor so informative about raw perfomance of drivers/cars as it used to be. Fuel load plays an important role, and we have to guess what exactly we are seeing here
Sorry if this has been a bit long but I think 1 Lotus was interested in some of these details
