Of the 15-odd plants I brought in, the only ones that did not drop leaves immediately were the plants that were set on window sills with a southern exposure. The 6 Rocotos under store-bought sunshine dumped all foliage within 24 hours, but started new growth immediately.
The plants in the window sills are now suffering the effects of season-change: yellowing leaves and slow leaf drop.
It's going to be interesting to see which regenerate better come Spring.