The starter went into the fridge last Sunday, right after a feeding, and I pulled it back out Friday evening. I let it come to room temperature, then planned to feed it as normal. But the top layer was kind of a funky color (grey-blue tinge) and the smell was a little off, so I scraped off the top layer, moved half to a clean jar and fed it. This morning it looked/smelled fine, and I started a batch of sourdough. I'm sure I'll report back on true rise time.
UPDATE: on a warm summer day - takes 7 hours to rise