Not sure about the "longer" part of what you've heard. Compared to what?
On all my haps, I typically wait until 2.5-3 weeks, borleyi included. I highly try to avoid any resemblance of an egg sac remaining on any fry I strip. Not that they won't live, but I think it's best they remain with Mom as long as reasonably possible. If had enough tank, I'd probably just move females and avoid stripping all together.