What do elite level hitters see at release?

The question is very interesting in that the elite hitter probably couldn't sit down and articuate what it is that he actually sees. Its more of a moment in time thing that he reacts to. He probably can't write it down. But, not so elite hitters feel the need to tell "elite wanna be hitters" what to look for so I'll try too.

We see the fastball exit the pitchers hand with the fingertips on top. Now, at elite levels there are two distinct fastballs and they act so extraordinarily different. The 4 seam fastball has tremendous backspin and the ball spinning with four seams cutting the air holds its' line. The two seam fastball is affected by the wind more and will be pushed to the pitchers arm side. Is there something that an elite level hitter sees that can discriminate between the two? The seams should be more noticeable on a two seamer. But, only lots and lots of experience gives you this perception. And, even then, that might not be enough. I mean how many times has Greg Maddux frozen hitters with that two seamer that just seems to back up.

We see the changeup exit the pitchers hand with the fingertips on top. This is what makes this pitch so extraordinarily difficult to hit. If the pitcher doesn't slow his harm speed down it's lethal. Think Cole Hamels or Trevor Hoffman.

The curveball exits the hand and the white off the ball gets on top of the fingers. A lot of people say look at the spin but that's just too late for elite level hitters. "White on top."

The slider gets a little less white on top but a "dot" emerges on the ball as it is progressing to home plate. The dot indicates to the batter that it will slide away from him.

It's quite an amazing process but no one truly knows what elite level hitters see because I believe elite hitters would have a difficult time explaining it themsleves.