[TeMPOraL]

I know the type of person. I usually can't follow them either (less about them being fast talkers, more about them being bad at explaining things). I found myself to usually only half-listen to what they say, and letting the other half of my mind to reconstruct the problem independently by itself. Sometimes I fail, and then I need to ask them to repeat what they just said. Other times my mental model is spot on, and I can find their problem quickly.