Preacher wrote on Nov 10^th, 2011 at 9:12pm:

Trolling simply covers more water.  Also, with more line out there's fewer spooked fish around.

I agree with Preacher here in a big way. Sometimes I do target shallow fish when trolling and that is when I let a lot of line out. Not at all unusual for me to dump 1/2 my spool with an original floating rapala. Keep in mind that with mono there will be substantial line stretch and for that reason I am apt to generally point the rod at the lure much more than otherwise. This makes the connection between hook and jaw much quicker.