It also takes me longer to understand things and it takes me longer to get to delivery than many of my peers.

However, I have consistently noticed that the quickness comes at the price of a shallow understanding, and the delivery is also often lacking in those who move fast.

For me, I have to really grok the thing I'm focussing on. I have to internalise it somehow and build a mental model. Once I've done that I am actually faster and more productive than the ones who leap on things quicker.