So One of the things for this summer was to up my cadence by running with a metronome. Today was the first 5 miler with it. Started out at 86 BPM and got it up to 89 by the second mile. Average speed dropped by 13 seconds. This is with a 10 step per minute increase. Once I got into it I realized I can probably do a faster cadence but this was a good start. The no music thing is going to be a problem on long runs.
So clear proof, if you need it, that increased cadence will speed up your pace at the same effort (I was doing a MAF run as well). If this keeps up I may be looking at dropping another 20 or so seconds off my half....whenever I get to run one.