I think there are areas where slow movers have an advantage. For instance, an area where the cost of an iteration is high - a slow mover may have an advantage planning and executing the iteration.

But, if you want to get faster, one thing is to ask yourself - do I have enough information to make a decision; is it possible to get more information - almost always the answer is yes, but will the cost in money or time or other resources be worth the additional information for the decision - or do we discover just as much moving forward to discover if a decision is wrong. Another question is if a decision is wrong, can we recognize that outcome quickly and what is the cost to move to a different decision.