I've been meaning to do this for a while. The guys at @atpfm graciously allowed me to use their podcast to compare the Overcasts 'Smart Speed' with RSSRadio's 'Silence Skip'

@MarcoArment (the author of Overcast) points out that he has optimised Overcast for a 'Natural Sound'.

I have aimed RSSRadio's silence skip at about 5/10% time saving on the average indie podcast.