This is what caused me to reactivate this thread. I certainly see that Mankin's clips match up to what he is saying, but I see Cabrera doing something different, he does not have that same rearward angle at the slot position.
So... two ways can be effective IMO....I will choose Cabrera
I hate to use the term "slow to fast", because I believe its more medium to fast. You have one moment within the swing to totally let it go, to really accelerate the bat head (whip/hands). If you blow your wad going rearward you will have nothing when you turn the corner, you will lose your ability to whip. This does not mean the bat is not accelerating rearward, this does not mean it will not blur.
And getting back to what this discussion is about.... I still believe the first milliseconds the hands are starting to swivel and the bat is not going at 100% speed as mentioned by RHC.
Question: Does the bat head blur rearward on a check swing?
FFS: I understand the elbow, this is not what we are talking about.
Not sure what you mean by same rearward angle at slot position. Actually I personally never name or try to achieve positions in a swing. Like slot position or truth position....not to say it doesn't work for some.
Here are some more Miggy that hopefully aren't quite as inside.
Not launching rearward? ^^^^^ok
IMO, he is great at maintaining a loaded barrel until it is time to release. His barrel stays loaded as his lead hand fights to get inside. He then throws the S*** out of it, with direction, through the ball.
So, I guess you could say deep is relative and dependent upon pitch location. I sometimes use with my players that the barrel stays loaded until the hands "see" the ball and then the top hand throws the barrel through the ball. On an inside pitch the barrel will stay loaded longer because the hands have farther to travel before they "see" the ball.
That is what I think Miggy does very well.