Why is the second call the "Early" call?

[For The Lead]

I thought I would throw this out there for open discussion just to see various peoples' view on the topic. Let's take two distances, 6f and 1 mile, even though it applies to any distance. I'm using these two distances just because the math is easy.

First, 1 mile. The second call (EPR) is at the 3/4 of a mile mark. That makes it easy. At that point in the race, the race is 3/4 or 75% OVER. Why would that be the "early" call?

Second, 6f. The second call (EPR) is at the 1/2 mark of the race. At that point the race is 66 2/3 or 66.67% OVER. Again, why would this be the "early" call?

In both of the above examples, the horses running 1st or 2nd at the second call (EPR) could have been 4th, 5th, 6th, 7th, etc. at the FIRST CALL. Is this an "early" horse?

If these types of horses would be considered "early", then how would you classify the horses that were running 1st or 2nd at the FIRST CALL? Are not these horses the real "EARLY" horses?

By the way, the same idea holds true at other distances as well, not just at 6f or 1 mile.

Please, feel free to comment.