It actually has his name, bottom-right.
The only thing wrong with this "predictor:" it only looks at retirement dates of the guys currently in that seat. I think it only looks at the junior man to make that determination, ie, not back-fills in that seat for other retirees.
In reality, guys will bid out of that seat for something else; generally higher-paying (except for guys at the top of the heap). That means you will likely advance earlier/faster than his "when can I hold it" gonculator.
Example: for my BES, it says I will only advance 6 spots before I retire....and I have a fair number of years remaining.
I have been tempted to write to DJ and suggest this be modified to some kind of base-stovepipe progression, where, as an example, if a 777 Capt retires, the hole created would be back-filled by the next most senior guy that was in a lesser-paying seat. To keep it less complicated, make all progressions stay in Base (which is also obviously false).
But it would give a better idea of when you could be the junior guy.