It's different than deliberate follow through if that's what you mean. The stick has already hit the ball before you can tense up on the act of hitting it. Same principle as the release stroke draw except you never let go of the stick.
Can't speak to the OPs stroke. He's probably taller than 6 ft too.
Other factors that come to mind are the "boing" of the stick. You get different resonances holding the stick on the butt cap than you do at the front of the wrap. This might be what he's talking about. If you hold the butt cap and bridge way forward you get maximum cue length and "boing" on the ball at contact. Still, the amount of juice it transfers depends on the stick and how it's made. IDK. I can barely get the burn rubber effect to happen from more than 4, 5 feet so no real analysis about what's at work.