HEre is the count I get from 1960 to present, 47 data pts, it seems:

23/11/6/7

Closer/stalkers/presser/front runner

Some notes: I counted FuPeg as a closer as he was 6 1/2 back at the 1/2 mile. I had to reclassify Charismatic as stalker as he was w/in 4 len. when he started passing all those horses on the backstretch. Smarty I have as stalker, although the Preakness I thought he pressed. Thunder Gulch reclassed as presser looking at the PPs. Barbaro stalker, although some think of him as a E/P...

I tried to base it on 0-2 lengths=presser; 2-4: stalker, 4 1/2 or more closer. It was not a completely uniform count, some based on a previous internet discussion some based on charts, some based on trips notes from the Ky derby site. BUt the trip notes are pretty good in that regard, if they say "well in hand" you can assume closer, if they say "never far away" assume pressing, etc. Also I didnt make it uniformly based on 2nd call, if it was a close call I tried to use best 2 out of first 3 calls. But in most cases, the 2nd call was descriptive.

If you think this is off, send me a PM and I'll send the complete list...