This is a little old, but I'll bite:
Senior Pastor: While I don't have daily contact with him, we are very friendly and both trust eachother. If I said I needed something, he would trust me, if he said we can't do it today, I would trust him. (but not being able to do it today, does not mean it won't happen this year, or even in the next few months).
Worship Pastor: He is a great friend, we spend time together often. He and I are on the same wavelength 99.99999% of the time. I will go to the moon for him if I needed to, and he will trust me when it hits the fan.
As for who sets the pace, we all do in certain respects. Pastor has a passion for the overall vision of the church, our worship pastor has a passion for the vision of worship in the church, I have a passion for the vision of technical arts in the church, and every other pastor or lead person (insert them all here) has a passion for there area of the vision of the church. So, in this case, the pace is synergistic of many peoples passions working together to accomplish the vision of the church.
Hope this helps you somewhat.
Karl P